Concept: An alien planet where all life has been overtaken by different instances of Godzilla; Godzilla Earth rules the earth and skies, having taken in all flora. In the seas, Shin Godzilla controls all fauna. Imitating the life that once was, the two sustain a volatile ecosystem where both keep the other in check.

EARTH concept: https://www.newgrounds.com/art/view/dickardt/08-05-19-monster-planet