User blog comment:Titanollante/Zilla 1998 is Godzilla/@comment-25285745-20141101214957

Well, even if Toho didn't consider the 1998 creature as Zilla, they could never actually market the 1998 film as Zilla or not include Godzilla's copyright with it. The film will always be titled Godzilla and be said to legally contain Godzilla. That was a given just because TriStar legitimately held the rights to Godzilla and copyrighted their design as Godzilla, and that the name "Godzilla" will always be used in the film itself.

This still needs looking into for several reasons. Toho still used an official image of "Godzilla 1998" for their Zilla copyright icon, Rulers of Earth uses the explicit design of "Godzilla 1998" for Zilla and in interviews Chris Mowry says that Zilla first appeared in the 1998 film, and Matt Frank, who is as legitimate a source of Keith Aken when it comes to official relations with Toho, maintains that Toho makes zero distinction between Zilla and Godzilla. This could be a matter of confusion as to who holds the copryights and what is copyrighted as what.