List of unmade giant monster films

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The following is a list of unmade kaiju projects, divided by the companies that intended to produce them and listed in chronological order.

Note: This list may not be complete due to projects becoming very obscure or never being fully revealed to the public.

Toho projects

Films

• The Ghostly Whale That Came from the Sea to Attack Tokyo (1952, pre-Godzilla concept by Eiji Tsuburaya)
• The Giant Monster from 20,000 Miles Under the Sea (1953, pre-Godzilla concept by Eiji Tsuburaya)
• Project G (1954, early concept for Godzilla (1954))
• The Volcano Monsters (1957, failed U.S. revision of Godzilla Raids Again)
• Bride of Godzilla? (1956)
• Space Mons (1962-1964, became Dogora)
• Continuation: King Kong vs. Godzilla (1963, direct sequel to King Kong vs. Godzilla)
• Frankenstein vs. the Human Vapor (1963)
• Frankenstein vs. Godzilla (1964, became Frankenstein vs. Baragon)
• Giant Monster Attack (1966, became Space Amoeba)
• Operation Robinson Crusoe: King Kong vs. Ebirah (1966, became Ebirah, Horror of the Deep)
• Batman Meets Godzilla / Batman vs. Godzilla (1966)
• Two Godzillas: Japan S.O.S.! (1967)
• All Monsters Attack Directive (1968, became Destroy All Monsters)
• Godzilla • Red Moon • Erabus • Halfun: Extraterrestrial Monsters a.k.a. Godzilla vs. Red Moon (1970)
• Godzilla vs. the Mutant Starfish (1972, better known as Godzilla vs. Hitodah)
• Godzilla vs. Hedorah 2 (1972)
• Godzilla vs. the Space Monsters: Earth Defense Directive (1972)
• The Return of King Ghidorah (1972, a.k.a. King Ghidorah's Great Counterattack!, became Godzilla vs. Gigan)
• Godzilla vs. the Megalon Brothers: The Undersea Kingdom's Annihilation Strategy (1973)
• Untitled 20th anniversary Godzilla film
• Giant Monsters Converge on Okinawa! Showdown in Zanpamisaki (1974, a.k.a. Mechanical Monster Garugan or Godzilla vs. Garugan)
• Showdown in Zanpamisaki: Godzilla vs. Mechagodzilla (1974, became Godzilla vs. Mechagodzilla)
• Prophecies of Nostradamus II: Fear of the Great Devil (1975)
• Terror of Mechagodzilla (1975, early script draft / original version)
• Tokyo SOS: Godzilla's Suicide Strategy (1976)
• King of Monsters: Resurrection of Godzilla (1977), became The Return of Godzilla
• Nessie (1978, co-produced with Hammer Films)
• Bride of Godzilla (1977-1978, second attempt / version)
• U.S.-Japan Collaboration: Godzilla (1978)
• The Anger of Godzilla (late 1970s)
• King of the Monsters: Rebirth of Godzilla (1978, color remake of Godzilla (1954))
• A Space Godzilla (1978-1979, a separate concept from Godzilla vs. SpaceGodzilla (1994))
• Godzilla: God’s Angry Messenger (1979)
• The Time Machine II (1979, George Pal co-production)
• Godzilla Legend: Asuka Fortress a.k.a. Godzilla vs. the Asuka Fortress (1979-1985)
• The Godzilla Show Movie (1980)
• Resurrection of Godzilla (1980, became The Return of Godzilla)
• Godzilla: King of the Monsters 3-D (1983, U.S. production)
• Godzilla 2: Godzilla vs. Biollante (1985-1989, original version of Godzilla vs. Biollante)
• Godzilla 2: Godzilla vs. the Robot Army (1985-1989, became Gunhed)
• Godzilla vs. Ankyron (1985-1989, replaced with Godzilla vs. Biollante, later adapted into Godzilla vs. Destoroyah)
• Unmade animated Godzilla film (1988)
• Coo from a Distant Ocean Sea (1989, live action adaptation)
• Mothra vs. Bagan (1990)
• Godzilla vs. the Mysterians (1990, Mick Anger-penned treatment)
• Godzilla 3 (1991, was going to be a direct continuation of Mothra vs. Bagan)
• Godzilla vs. King Kong (1990-1991, replaced with Godzilla vs. King Ghidorah)
• Micro Super Battle: Godzilla vs. Gigamoth (1991-1992, split into Godzilla vs. Gigamoth and Godzilla's Counterattack)
• Godzilla's Counterattack (1991-1992, became Godzilla vs. Mechani-Kong)
• Godzilla vs. Mechani-Kong (1991, became Micro-Universe in Godzilla)
• The Return of King Ghidorah (1992, replaced with Godzilla vs. Gigamoth)
• Micro-Universe in Godzilla (1991-1992, replaced with Godzilla vs. Gigamoth)
• Godzilla 2001 (1992, Yoshimitsu Banno project)
• Godzilla vs. Gigamoth (1992, became Godzilla vs. Mothra)
• Shin Godzilla (1992)
• Godzilla vs. MechaMothra (1993)
• Godzilla vs. Berserk (1993, became Godzilla vs. Mechagodzilla II)
• Godzilla vs. Mechagodzilla: Metallic Battle (1993, became Godzilla vs. Mechagodzilla II)
• Godzilla vs. Mechagodzilla II (1993, early draft versions)
• Godzilla vs. King Goku (1994)
• Godzilla vs. Emperor Ghidorah (1994)
• Godzilla vs. AstroGodzilla (1994, became Godzilla vs. SpaceGodzilla)
• Godzilla vs. NeoGodzilla (1994, became Godzilla vs. SpaceGodzilla)
• SpaceGodzilla's Counterattack (1994-1995, early proposal for the 22nd Godzilla film)
• Godzilla (1994-1996, U.S. production)
• Godzilla vs. Cyber City (1994-1995)
• Godzilla vs. Giant Monster Varan (1994-1995)
• Godzilla vs. Ghost Godzilla / Godzilla vs. Godzilla (1994-1995)
• Godzilla vs. Bagan (1995)
• Godzilla vs. Junior Godzilla (1994-1995)
• Godzilla vs. Chaos (1994-1995)
• Godzilla vs. the Divine Beast (1994-1995)
• Godzilla vs. Deep Sea Life (1994-1995)
• Godzilla vs. Biomonster (1994-1995)
• Godzilla vs. Super Atomic Godzilla (1994-1995)
• Godzilla vs. Lambda (1994-1995)
• Godzilla vs. Barubaroi (1994-1995, replaced with Godzilla vs. Destoroyah)
• Yamato Takeru II (1997)
• GODZILLA 2 (1999/2000, first of two planned sequels to GODZILLA (1998); both were replaced by Godzilla: The Series)
• Unmade King Ghidorah film (1999)
• The Mysterians remake (2001, Koichi Kawakita project)
• Godzilla Reborn (2001, U.S.-made sequel to Godzilla 2000: Millennium)
• Godzilla vs. Kamacuras (2001, original vision for Shusuke Kaneko's Godzilla film)
• Godzilla vs. M (2001, a.k.a. Godzilla vs. Uchujin, early draft for Shusuke Kaneko's Godzilla film)
• Godzilla X Varan, Baragon and Anguirus: Giant Monsters All-Out Attack (2001, became Godzilla, Mothra and King Ghidorah: Giant Monsters All-Out Attack)
• U.S. Godzilla reboot (2000-2003, new U.S. Godzilla film considered by Sony prior to them losing the rights to Godzilla in 2003; would not have been connected to GODZILLA (1998))
• Godzilla vs. Deathla (2003-2005, became Godzilla 3D to the MAX)
• Type-3 Kiryu (2005)
• Godzilla 3D to the MAX (2007-2009, replaced with Godzilla (2014))
• Godzilla (2012, became Godzilla (2014))
• Hedorah vs. Midora, a.k.a. Hedorah 2 (2014-2017)
• Shin Hedorah (2016-2017, Yoshimitsu Banno project)
• Matango remake (2016, Steven Soderbergh project)
• Shin Godzilla Strikes Back (2018)

Television series

• Monster Island television series (1963)
• Toho Special Effects Terror-Beast Series: Zone The Meteor Man - Production Memo (1972)
• Toho Monster TV Film Project: Zone the Meteor Man (1972)
• Untitled Godzilla tokusatsu series (1972-1973, reworked into Zone Fighter)

Daiei / Kadokawa projects

• Great Demon Beast Dagora (1964)
• Giant Horde Beast Nezura (1964-1965)
• Fire-Breathing Turtle Attacks Tokyo (1965, early version of Gamera)
• Gamera vs. the Space Icemen (1966, a.k.a. Gamera vs. the Ice Men)
• Untitled fourth Daimajin film (1966-1967)
• Giant Space Monster Elegan and Command Robot (1966)
• Gamera vs. Giant Vampire (1966-1967, became Gamera vs. Gyaos)
• Gamera vs. Nezura (1966-1971)
• Gamera vs. Leoman (1971, rejected in favor of Gamera vs. Zigra)
• Gamera vs. Two-Headed Monster W (1972, better known as Gamera vs. Wyvern)
• Mr. Monster (1974, TV series)
• Daimajin (1982-1984, Ishiro Honda)
• Nezura (1990s, second attempt)
• Gamera vs. Phoenix (1993-1994)
• Gamera (1993, early version of Gamera the Guardian of the Universe)
• Gamera 3: Gamera vs. Godzilla (1995-1998)
• Gamera 1999 (1996-1998, became Gamera 3: Revenge of Iris)
• Daimajin (1997-1998, Yasutaka Tsutsui, second attempt)
• Untitled fourth Heisei Gamera film (1999)
• Godzilla vs. Gamera (2002)
• Untitled Gamera Cartoon Network series (2005-2008, Japanese-U.S. TV co-production)
• Daimajin (2008, Takashi Miike)
• Gamera 3D (2010)

Tsuburaya Productions projects

Films

• Ultraman: Operation Giant (1967)
• Ultraman: Hero from the Stars (1978)
• Ultraman: The Jupiter Effect (1978)
• Ultra Q film revival (1980s, Shusuke Kaneko)
• Yellow Eyes (2004, became Ultraman: The Next)
• Ultraman 2: Requiem (2005)
• Ultraman Mebius and the Ultra Brothers 2 (2007-2008)
• Koseidon (Chinese remake of 1978 tokusatsu film, 2015-2017)

Television series

• Unbalance (1965, became Ultra Q)
• WoO (1966, later inspired 2006's Bio Planet WoO)
• Scientific Special Search Party: Bemular (1966)
• Redman (1966, became Ultraman)
• Ultra Eye (1967, became Ultraseven)
• Ultra Garrison (1967, became Ultraseven)
• Untitled Ultraman sequel (1969-1970, became Return of Ultraman)
• Jumbo A (1969-1970, reworked into Jumborg Ace)
• Mirror Red (1972-1973, sequel to Mirrorman)
• Gigantic Beast Planet (1974, became Dinosaur Expedition Team Born Free)
• Garla (1976 adaptation of Go Nagai mecha manga)
• Ultraman Melos (1976-1977, became Andro Melos)
• Ultraman USA (1986-1988, TV version of Hanna-Barbara animated miniseries)
• Untitled Ultraman 80 adaptation by Adam West (1984-1988)
• Untitled Ultraman Great sequel (1992-1994)
• Gridman Sigma (1994)
• Ultraman Neo (1995, became Ultraman Neos)
• Ultraman Cross (2004, became Ultraman Nexus)
• Return of Izenborg (2014-2016, Saudi Arabia-funded TV remake, later reworked into a short film)

Toei projects

• Daitetsujin 17 vs. J.A.K.Q. Dengekitai (1977, reworked into J.A.K.Q. Dengekitai vs. Gorenger)
• Devil-Manta (1978)
• Kongorilla (1977-1978)
• Mortal (1980)
• Power Rangers Lightspeed Rescue: The Movie (1999-2001, unmade Japanese-U.S. co-production)
• Mazinger Z: The Movie (2000, live action U.S.-Japanese co-production by James Cameron)
• Getter Robo (2004, live action U.S.-Japanese co-produced film by Universal)
• Dino Mech Gaiking (2009-2016, U.S.-Japanese co-produced adaptation of the 1976 anime by Valhalla Entertainment)
• Rebellions (2011)
• UFO Robo Grendizer (2013-2015, Russian-Japanese co-production)

Nikkatsu projects

• Arkitius the Giant Squid (1966)
• Monster Gigant (1966)
• Monster Momonra (1966)
• Reigon: Devil of the Seabed (1966)
• Untitled Gappa remake (1995, often mistaken for the urban legend film Gappa vs. Guilala)

King Kong and related projects

• The Beast (1932, first draft version of King Kong)
• The New Adventures of King Kong (1934)
• King Kong vs. Frankenstein / King Kong vs. Prometheus
• The Eighth Wonder (1952)
• Space Kong (1969)
• King Kong (1966-1971, Hammer Films-planned production)
• King Kong (1975, Roger Corman-planned production)
• The Legend of King Kong (1976, remake of the original King Kong by Universal Pictures)
• The Illegitimate Son of You Know Who (1976)
• Daughter of King Kong (1976-1986)
• King Kong in Africa (1976-1985)
• King Kong in Moscow (1976-1985)
• Bionic Kong / Bionic Kong! King Kong in Moscow (1976-1985)
• King Kong vs. Orca (1976-1980)
• Mighty Joe Young (1980s, TV movie)
• The Return of Mighty Joe Young (1984, TV movie)
• King Kong (1990, John Landis-planned production)
• King Kong (Peter Jackson's original 1996 version)
• The Legend of King Kong (1999-2000, second attempt)

Miscellaneous

• U.S. The King Kong Show comic book series (1966)
• The Return of King Kong (late 1960s, planned comic book series)
• Space Kong (1969, planned comic book series)
• Kid Kong (1987, animated series)
• King Kong: Skull Island (2017, TV series)

Willis O'Brien projects

• Atlantis (1927, intended as the follow-up to The Lost World (1925))
• Creation (1930, unfinished)
• Baboon: A Tale of the Yeti
• The War Eagles
• Gwangi (became The Valley of Gwangi)
• Umbah
• Last of the Labyrinthodons
• Emilio and Guloso (1950s)
• Valley of the Mists
• The Last of the Oso Si-Papu
• The Vines of Ceres (1950)
• The Bubbles (1960-1962)
• The Leviathan

Other unmade giant monster films

• Lost Island (1934, unfinished)
• The Las Vegas Monster (1957)
• Behemoth the Sea Monster (1957, original version of The Giant Behemoth)
• Even and the Dragon (1958)
• Aladdin and the Giant (1959)
• Giganturo (1950s-1960s)
• The Demon from Dimension X (1960s, Paul Frees)
• Kuru Island (1961, became Gorgo)
• Breakout of the Loch Ness Monster (1963)
• Hell Spawn (1960s-1970s)
• Centauri III (1970-1973, Jim Danforth)
• G.O.O. - Genetic Octopodular Ooze (1971)
• Zeppelin v Pterodactyls (1971, Hammer Films)
• The Devil Garon (1971-1972, based on the 1959 Osamu Tezuka manga)
• Jewellers (1972-2010, Yoshimitsu Banno)
• Dune (1973-1976, Alejandro Jodorowsky)
• Kali, Devil Bride of Dracula a.k.a. Dracula and the Blood Lust of Kali (1974, Hammer Films, planned but unmade sequel to The Legend of the 7 Golden Vampires (1974))
• The Birth of Monster Nesugon (1973-1978)
• Baby Kong (1976, Mario Bava)
• The Mighty Gorga (1976, re-release version)
• Thongor in the Valley of Demons (1976-1982)
• Yeti (1976-1977, Dino de Laurentiis)
• Tentacles (1977, Arthur C. Clark)
• War of the Insect Gods (1978-1979)
• When the Earth Cracked Open (late 1970s, Hammer Films)
• Devilfish (late 1970s, Bert I. Gordon)
• Snails (1979)
• Cry of Cthulhu (1979)
• Dinosaur Girl (late 1970s)
• Timegate (1979, reworked into The Day Time Ended)
• Star Godzilla (1980, unauthorized Hong Kong production)
• Ghost Smashers (1981-1984, became Ghostbusters)
• Monstrosaurus (1982)
• The Grid (1982)
• Attack of the 50 Foot Woman (mid-1980s, Jim Wynorski, planned but unmade remake of Attack of the 50 Foot Woman (1958))
• Mobile Suit Gundam (1983-1984, Hollywood / U.S. adaptation of the 1979 anime series)
• Zoo-Ship (1985)
• It Ate Cleveland (1985-1988, a.k.a. Godzilla vs. Cleveland)
• Apartment Living (1987, George A. Romero)
• Mutant Spawn 2000 (1987, became Creepozoids)
• The Dirty Filthy Slime (1988)
• Fiends (1988, Charles Band)
• Creepozoids 2 (1988, Charles Band)
• West of Kashmir: A Sherlock Holmes Adventure! (1989)
• Bloodless (1989, Charles Band)
• Tetsujin 28-Go (1990, eventually evolved into Tetsujin 28-Go (2005))
• The Iron Man (1991-1996, eventually evolved into The Iron Giant)
• Dinosaurs Attack! (early 1990s, Tim Burton)
• Ssslither (1990s)
• Ghostbusters: Hellbent, a.k.a. Ghostbusters 3: Hellbent (1990s)
• Tor (1991)
• Giant Robo: Siege of Babel (1992-1998, OVA miniseries)
• The Hawkline Monster (1993, Tim Burton)
• Gigantor (1994-1995, U.S. film adaptation of Tetsujin 28-Go)
• Battle Jox (1994)
• Teenage Mutant Ninja Turtles 4: The Next Mutation (1994-1996, became the TV series Ninja Turtles: The Next Mutation)
• The X from Outer Space - GUILALA - (1995, planned but unmade remake of The X from Outer Space)
• Funnelweb (1996)
• Omnivore (1996-1997)
• Insectosaur (1997)
• Subterranean (1997)
• Extinct (1997)
• Really Big Bugs (1997)
• Bed Bugs (1997)
• Tom Slick: Monster Hunter (1998)
• Goosebumps (1998, Tim Burton)
• I Was a Teenage King Kong (1998, Germany)
• Blue Planet (1998-2002, Rainbow Studios)
• Razorfish (early 2000s)
• Conqueror Worm (2000)
• Reptilicus 2 (2001, planned but unmade sequel to Reptilicus (1961))
• Ogopogo (2001)
• Yonggary 2 (2001, planned but unmade sequel to Yonggary (1999))
• Gi-Ants (2002)
• Robotech (2002-2020, unauthorized live action adaptation of Super Dimension Fortress Macross)
• Attack of the Giant Gull (2002, Canada)
• Neon Genesis Evangelion (2003-2006 and 2013-2015, live action film adaptation)
• Titans (2003)
• It Waits Below (2004)
• Untitled Megas XLR TV movie (2004-2006)
• Giant Robo (2004-2006, planned but unmade remake of the 1967 manga and tokusatsu TV series of the same name by Akio Jissoji)
• Kongula, Ape Giant of Terror (2005, Germany)
• Big Bird (2005, Thailand)
• Fire from Above (2006)
• Deadly Waters (2006)
• Robot Taekwon V (2006-2017)
• At the Mountains of Madness (2006-2014)
• Project Ultraman a.k.a. Ultraman Millennium (2006, unauthorized Thailand production)
• Calling All Robots (2007-2012)
• Killmeleon (2008)
• Tetsujin 28-Go (2008-2009, Imagi Animation Studios)
• Mortis Rex (2008-2015)
• Battletech (2008-2010)
• The Blob (2009, Rob Zombie)
• Big Man Japan (2011, Hollywood / U.S. remake)
• Attack on Titan (2011-2012, Tetsuya Nakashima)
• Shogun Warriors (2010s, Mecha Cinematic Universe attempt)
• Rampage (2011 attempt, based on the 1986 arcade game; later released in 2018 as Rampage)
• Gigantor (2011, unauthorized remake of Tetsujin 28-Go)
• Hellyfish (2012, original feature length film version)
• Dinosaurs vs. Aliens (2012; however, a graphic novel based on the script was published)
• Monster Roll (2012; however, a promotional short film was made)
• Evala, the Land Mine Daikaiju (2014; however, a "pilot film" was made)
• Will Smith's Ultraman (2013-2015, unauthorized Thailand-U.S. co-production)
• Jumbo A vs. Ninja Panda (2013-2015, unauthorized Thailand-U.S. co-production)
• Monster League, a.k.a. Oldzilla (2015)
• Kong, the Origin (2016)
• Condor (2010; however, a promotional video was made)
• Fish War
• Monsterpocalypse (board game adaptation)
• The Leviathan (unmade Neil Blomkamp-produced sci-fi monster film)
• Dino-Warp
• Dragonriders
• Zoo World
• Crackodile

Miscellaneous projects

• Stop! (1960s, television series)
• Jaguarman (1967, unsold P-Productions television pilot)
• Hyouman, a.k.a. Leopard Man (1967, unsold television pilot)
• Genocide: War of the Insects (1968, original cut)^{[citation needed]}
• The Space Giants (1980-1994, unauthorized comic book adaptation of Ambassador Magma)
• Giant Robo (planned but unmade anime remake of the 1967 manga and tokusatsu TV series of the same name, reworked into Giant Robo: The Day the Earth Stood Still)
• Rodan (1991, NES video game)
• Godzilla and the Lost Continent (late 1990s, Random House Books, would have been the fifth and final novel of Marc Cerasini's Godzilla novel series for teens and young adults)
• Godzilla vs. the Terminator (1990s, Dark Horse Comics)
• New Golden Bat, also known as The Golden Bat: Millennium Version (2000s, unsold anime pilot)
• Giant Robo (2004-2005, anime pilot reworked into GR: Giant Robo)
• They Came from Hollywood (2006-2008, video game)
• Godzilla vs. Cthulhu (2010, IDW Publishing)
• Creature at Bay (2013, Syfy television series / pilot script)

References

This is a list of references for List of unmade giant monster films. These citations are used to identify the reliable sources on which this article is based. These references appear inside articles in the form of superscript numbers, which look like this: ^[1]

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