List of unmade giant monster films

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

• 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)
• The Volcano Monsters (1957, failed US revision of Godzilla Raids Again)
• Bride of Godzilla? (1956)
• 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 vs. Godzilla (1966)
• Two Godzillas: Japan S.O.S.! (1967)
• All Monsters Attack Directive (1968, became Destroy All Monsters)
• Godzilla vs. The Mutant Starfish (1972, better known as Godzilla vs. Hitodah)
• Godzilla vs. Hedorah 2 (1972)
• Godzilla • Redmoon • Erabus • Hafun: Extraterrestrial Monsters a.k.a. Godzilla vs. Redmoon (1974)
• 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)
• Jet Jaguar vs. Megalon (1972/1973)
• Godzilla vs. The Megalon Brothers: The Undersea Kingdom's Annihilation Strategy (1973)
• 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)
• Terror of Mechagodzilla (1975, early script draft / original version)
• S.O.S. Japan! Godzilla's Suicide Strategy (1976)
• Gods of Godzilla a.k.a. Super Godzilla: God's Angry Messenger (Late 1970's)
• Nessie (1978)
• U.S.-Japan Collaboration: Godzilla (1978)
• King of the Monsters: Rebirth of Godzilla (1978)
• A Space Godzilla (1978-1979, separate concept from 1994's Godzilla vs. SpaceGodzilla)
• Godzilla Legend: Asuka Fortress a.k.a. Godzilla vs. the Asuka Fortress (1979)
• Resurrection of Godzilla (1980, became The Return of Godzilla)
• Godzilla: King of the Monsters 3-D (1983, American 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)
• Untitled Animated Godzilla Film (1988)
• Mothra vs. Bagan (1990)
• Godzilla 3 (1991, was 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 apart 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 vs. Gigamoth (1992, became Godzilla vs. Mothra)
• Godzilla vs. MechaMothra (1993)
• Godzilla vs. Berserk (1993, became Godzilla vs. Mechagodzilla II)
• Godzilla vs. Mechagodzilla II (1993, early draft versions)
• Godzilla vs. AstroGodzilla (1994, became Godzilla vs. SpaceGodzilla)
• Godzilla (1994, American production)
• Godzilla vs. Ghost Godzilla (1995, replaced with Godzilla vs. Barubaroi, then Godzilla vs. Destoroyah)
• Godzilla vs. Bagan (1995, possibly planned according to Takao Okawara)
• Godzilla vs. Barubaroi (1995, replaced with Godzilla vs. Destoroyah)
• Yamato Takeru II (1997)
• GODZILLA 2 (1999/2000, sequel to GODZILLA (1998), replaced by Godzilla: The Series)
• Untitled King Ghidorah Film (1999)
• Godzilla Reborn (2001, American-made sequel to Godzilla 2000: Millennium)
• Godzilla vs. Kamacuras (2001, original vision for Shusuke Kaneko's Godzilla film)
• Godzilla vs. M (2001, also known as 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)
• American Godzilla Reboot (2000-2003, new American 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)
• Godzilla 3D to the MAX (2007-2009, replaced with Godzilla (2014))
• Godzilla (2012, became Godzilla (2014))
• Hedorah 2, also known as Hedorah vs Midora (2014-2017))
• Shin Hedorah (Yoshimitsu Banno, 2016-2017)
• Matango (Steven Soderbergh remake, 2016)

Unproduced Television Series

• Toho Special Effects Terror-Beast Series: Zone The Meteor Man - Production Memo (1972)
• Toho Monster TV Film Project: Zone The Meteor Man (1972)

Daiei Motion Picture Company / Kadokawa Pictures

• Giant Horde Beast Nezura (1965)
• Gamera The Giant Monster vs. The Ice Men From Outer Space (1966, also known as Gamera vs. The Ice Men)
• Gamera vs. Two-Headed Monster W (1972, better known as Gamera vs. Wyvern)
• Gamera vs. Garasharp
• Gamera vs. Phoenix (1993-1994)
• Untitled 60-Minute Gamera Children's Film (1994-1995, replaced with Gamera: Guardian of the Universe)
• Godzilla vs. Gamera (2002)
• Daimajin (2006, Takashi Miike)
• Gamera 3D (2010)

Tsuburaya Productions

• Ultraman: Operation Giant (1967)
• Ultraman: Hero from the Stars (1978)
• Ultraman: The Jupiter Effect (1978)
• Ultra Q Film Revival (1980's, Shusuke Kaneko)
• Yellow Eyes (2004, became Ultraman: The Next)
• Ultraman 2: Requiem (2005)
• Ultraman Mebius and the Ultra Brothers 2 (2007-2008)

Unproduced Television Projects

• 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 Ultra Seven)
• Ultra Garrison (1967, became Ultra Seven)
• Gridman Sigma (1994)
• Ultraman Cross (2004, became Ultraman Nexus)

Toei Company Ltd. / Saban Brands

• Devil-Manta (1978)
• Kongorilla (1977-1978)
• Mortal (1980)
• Rebellions (2011)
• Power Rangers: Origins (2012, co-production between Toei Company Ltd. and Saban Brands)
• Power Rangers (Max Landis version, 2016-2017)

Unproduced Television Projects

• Daitetsujin 17 (anime version, 1977)
• Untitled Yamato Tekeru / Spiderman Series (1978)
• Baseball Sentai V-Leaguer (1983)
• Space Squadron Cosmoman, also known as Uchuu Sentai Cosmoman (1985, became Changeman)
• Power Rangers Time Force film (2001)
• Power Rangers: Hexagon (2003)
• Power Rangers 21, AKA Power Rangers Cyber Corps (2014)

Nikkatsu Corporation

• Arkitius the Giant Squid (1966)
• Monster Gigant (1966)
• Monster Momonra (1966)
• Reigon: Devil of the Seabed (1966)
• Untitled Gappa Revival (1995, often mistaken for the otherwise false Gappa vs. Guilala)

Willis O'Brien Projects

• Atlantis (1927, intended as the follow-up to The Lost World)
• Creation (1930's)
• Baboon: A Tale of the Yeti
• The War Eagles
• Gwangi (became The Valley of Gwangi)
• King Kong vs. Frankenstein
• Umbah
• Last of the Labyrinthodons
• Emilio and Guloso (1950's)
• Valley of the Mist
• The Last of the Oso Si-Papu
• The Bubbles
• The Vines of Ceres (1950)
• The Leviathan

King Kong and Related Projects

• The Beast (first draft version of King Kong, 1932)
• The New Adventures Of King Kong (1934)
• The Eighth Wonder (1952)
• Space Kong (1969)
• King Kong (Hammer Films-planned production, 1966-1971)
• King Kong (Roger Corman-planned production, 1975)
• The Legend of King Kong (1976, remake of the original King Kong by Universal Pictures)
• King Kong In Africa (1976-1978)
• King Kong In Moscow (1980's)
• Mighty Joe Young (TV Movie, 1980's)
• The Illegitimate Son of King Kong (1983)
• Son of Kong (1986)
• King Kong (John Landis-planned production, 1990)
• King Kong (Peter Jackson's original 1996 version)
• The Legend of King Kong (Second Attempt, 1999-2000)

Ray Harryhausen Projects

• Atlantis (1930's, separate from the Willis O'Brien project)
• The Jupiter Beast, also known as The Jupiter Project (1937-1949)
• Evolution of the World, also known as Evolution (1940)
• Food of the Gods (1949)
• The Satyr (1946-1950's)
• The Elementals (1952-1953)
• Journey to the Center of the Earth (Eugene Lourie, 1953)
• Food of the Gods (1961, second attempt)
• King of the Geniis (1968-1973)
• To Live Forever (Late 1960's)
• Sinbad and the 7 Wonders of the World (1981)
• Sinbad on Mars, also known as Sinbad's Voyage to Mars (1981)
• People of the Mist (1983)
• Force of the Trojans (1984)

Other Unmade Giant Monster Films

• The Black Pearl (1932)
• Lost Island (1934, scenes were filmed but was never competed)
• Lost Atlantis (1938-1940)
• The Big Freeze (1940's)
• The Giant Sloth (1950's)
• Them! (3D colored version, 1953-1954)
• 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)
• Attack of the 50ft Woman 2 (1958-1959)
• Giganturo (1950s-1960s)
• The Demon from Dimension X (Paul Frees, 1960s)
• Kuru Island (1961, became Gorgo)
• Breakout of the Loch Ness Monster (1963)
• Hell Spawn (1960's-1970's)
• 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 manga)
• Dune (Alejandro Jodorowsky, 1973-1976)
• Kali: Devil Bride of Dracula, AKA Dracula and the Blood Lust of Kali (1974, Hammer Films)
• 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)
• Tentacles (1977, Arthur C. Cleark)
• War of the Insect Gods (1978-1979)
• When the Earth Cracked Open (late 1970's)
• Devilfish (late 1970's, Bert I. Gordon)
• Snails (1979)
• Cry of Cthulhu (1979)
• Dinosaur Girl (late 1970's)
• Star Godzilla (1980, unauthorized Hong Kong production)
• Ghost Smashers (1981-1984, became Ghostbusters)
• Monstrosaurus (1982)
• The Grid (1982)
• Revenge of the 50 Foot Woman (mid-1980's, Jim Wynorski)
• Zoo-Ship (1985)
• It Ate Cleveland (1985-1987, better known as Godzilla vs. Cleveland)
• Apartment Living (1987, George A. Romero)
• The Dirty Filthy Slime (1988)
• West of Kashmir: A Sherlock Holmes Adventure! (1989)
• Bloodless (1989, Charles Band)
• Dinosaurs Attack (early 1990's, Tim Burton)
• Ssslither (1990's)
• Ghostbusters: Hellbent, also known as Ghostbusters 3: Hellbent (1990's)
• Tor (1991)
• Battle Jox (1994)
• Funnelweb (1996)
• Omnivore (1996-1997)
• Insectosaur (1997)
• Extinct (1997)
• Really Big Bugs (1997)
• Bed Bugs (1997)
• Tom Slick: Monster Hunter (1998)
• I Was A Teenage King Kong (1998, Germany)
• Razorfish (early 2000's)
• Conqueror Worm (2000)
• Reptilicus 2 (2001)
• Ogopogo (2001)
• Gi-Ants (2002)
• Attack of the Giant Gull (2002, Canada)
• Neon Genesis Evangelion (live action film adaptation, 2003-2006)
• It Waits Below (2004)
• Untitled Megas XLR TV Movie (2004-2006)
• Kongula, Ape Giant of Terror (2005, Germany)
• Big Bird (2005, Thailand)
• Fire From Above (2006)
• Deadly Waters (2006)
• At the Mountains of Madness (2006-2014)
• Project Ultraman, AKA Ultraman Millennium (2006, unauthorized Thailand production)
• Calling All Robots (2007-2012)
• Killmeleon (2008)
• Tetsujin 28 (2008-2009, Imagi Animation Studios)
• Mortis Rex (2008-2015)
• The Blob (2009, Rob Zombie)
• Big Man Japan (2011, Hollywood / American remake)
• Attack on Titan (2011-2012, Tetsuya Nakashima)
• Gaiking the Movie (2011, though a proof-of-concept trailer was made)
• Rampage (2011, based on the 1986 arcade game)
• Notzilla (2011, though a promotional trailer was made)
• Hellyfish (original feature length version, 2012)
• Dinosaurs vs Aliens (2012, though a graphic novel based on the script was published)
• Monster Roll (2012, though a promotional short was filmed)
• Evala, The Land Mine Daikaiju (2014, though a 'pilot film' was made)
• Monster League, also known as Oldzilla (2015)
• Gigantic (Disney Animation, 2015-2018)
• Dino-Warp
• Dragonriders
• Zoo World

Miscellaneous Projects and Deleted Sequences

• Stop! (television series, 1960's)
• Jaguarman (unsold television pilot, 1967)
• Genocide: War of the Insects (1968, original cut)
• Hyouman, also known as Leopard Man (unsold television pilot, 1967)
• Starcrash (1979, original cut)
• Rodan (NES video game, 1991)
• Godzilla and the Lost Continent (late 1990's)
• Godzilla vs. Terminator (Dark Horse Comics, 1990's)
• Tremors: Lost Monsters, also known as Stampede (television series, 1995)
• New Golden Bat, also known as The Golden Bat: Millennium Version (unsold anime pilot, 2000's)
• Dexter's Laboratory: Robot Rumble (video game, 2001-2004)
• They Came From Hollywood (video game, 2006-2008)
• Godzilla vs Cthulhu (IDW Publishing, 2010)
• Creature At Bay (television series / pilot script, 2013)

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]