OK so i found the whole is it canon tweet i think
https://twitter.com/KyoeiToshi/status/1571664985146753025
Moving onto the Singular Point itself.
https://twitter.com/KyoeiToshi/status/1568325757797023744?cxt=HHwWgICy2fT958MrAAAA
"In a segment that occurs before the first episode of the SP anime, the being that is the Singular Point muses. It has no name and is a truly cosmic being-it experiences all time and space, all dimensions, all alternative timelines, at once. It fights, and fights, and fights over and over. It never stops until it finally succeeds in winning and destroying everything. Even then, it continues to fight. It visualizes 1954 in Nigashio City (where lots of SP takes place). It sees a man. The man is his nemesis.He’s holding what we know to be the OD. The man sees him. Ashihara, playing his part in the legend we hear of in the series-resulting in the giant Goji skeleton?"
Rodan fight scene.
https://twitter.com/KyoeiToshi/status/1569040795965034499
"continuing the Radon-JJ fight. Radon wonders why the smallest beings aren’t running but wiping their eyes after falling. He’s going to peck at it to see what it does, but stops when a slightly bigger being with a white head rushes in front to protect it.
He’s seen this being before! Was it the future or far in the past? .Radon pauses to think it over, but the strains of Alapu Upala remind him of his purpose-determining if the silver being is moving on its own.That, and JJ hitting him! Radon and JJ fight, and Radon sees the small bald being inside JJ throwing a fit. He wonders if he is a parasite, or if the silver being is tormenting him. He decides to free the small being, and does. He’s confused why the small being isn’t appreciative. He wants to call a truce but doesn’t know how to communicate with them-but then realizes his time is at an end, and rises into the sky to die. Then we move to Mei and her internal dialogue. Basically this is establishing her mindset. While she has a vivid imagination and is obsessed with fantasy, she’s even more obsessed with figuring out the science that would allow these things to exist-she’s at once the flowing water and the rock.This all starts with her fascination with angels-humans with wings but wings that don't evolve from arms."
Also instead of Robogodzilla, Ghidorah is hinted at the very end of the book too.
https://twitter.com/KyoeiToshi/status/1555670398871773185
While Kyoei didn't specify ghidorah i recall seeing a post on TK mentioning it.