Talk:Godzilla, King of the Monsters (Marvel)/@comment-343942-20150225032226/@comment-25285745-20150225063233

To Marvel the mutation is canon. From a legal standpoint and if anyone asked Toho about it, it isn't. But yes within the context of the Marvel Universe, the mutation is suggested to be the Marvel Godzilla.

The Leviathan, on the other hand, does not appear to be related to the Marvel Godzilla. More likely, it's just a Godzilla look-alike. There's nothing to imply it's supposed to be the Marvel Godzilla, demonstrated by its vastly different appearance, inconsistent backstory, and relative weakness compared to the incredibly powerful Marvel Godzilla.