I cant say definitively what changes I would make, but here are just some thoughts that float around in my head towards this concept and idea. These are just my thoughts though.



I think I would prolong Godzilla Jrs childhood considerably, maybe I dont know.



I think there is a slight confusion here caused by godzilla glut, there are like 5/6 godzillas going on here. I think that some of these godzillas should be comobined, Shin Godzilla and Legendary Godzilla for example are more or less the ultimate forms of Villainous godzilla and Heroic Godzilla, so why not make this literal?



With the Ghost Godzilla heart regenerating into Shin Godzilla, and either Godzilla 2 or 3 becoming legendary godzilla? I know I have commented it before, but I like the idea of Godzilla being flung backwards in time to the beginning of life on earth, and becoming the legendary godzilla through simply surviving millions of years and becoming this hardened ancient creature.



And although hte "ghidorah is made from three tiny little things" origin is lame, maybe somehow there is an idea there that can be harvested? maybe the battle between godzilla and this youthful ghidorah made in the present was so destructive both had to be thrown backwards in time?



There is also Godzilla Earth... which, I wil lcome out adn say is my least favorite iteration of the character, and I was not overly impressed with the anime trilogy in any way shape or form. And this may come off as controversial, but I kinda wanna connect Godzilla Earth to godzuki, either by making it th adult form and the symbiont fliers to be its young, or just by making godzuki one of those weirdo things.



Or maybe Godzilla Earth is the ultimate form of the more chaotic neutral godzilla depictions, which I tend to think of as Godzilla 3?



I dont know, I am just throwing random ideas out there. Maybe I will write up my own fanonical godzilla timeline. I am warming up to the idea of Godzilla 1 - Shin Godzilla, Godzilla 2 - Legendary, Godzilla 3 - Earth, thought with each of these being the ultimate forms of those godzillas.