User blog comment:Spinocroc123/Godzilla projects!/@comment-3367060-20150917184251/@comment-26155014-20150917202248

it's only loosely adapts several parts of the comic and adds them to the film, for example, in RoE Kiryu was seen capturing several monsters and send them into Monster Island, which is much better (in my opinion) than just showing them in the island with no explanation of how the got there in the first place.

i'll also explain in the Zilla fanon article.