The "Marvel Cosmology" argument is so retarded. According to their own stupid headcanons, they think that Ultima is actually every single Godzilla. This should also include Marvel Godzilla, meaning that Ultima already gets Marvel Cosmology scaling (and should go above it since it perceives all reality as a dream). They can't even rely on "Oh, it's just a crossover" excuses since Marvel Godzilla is literally its own version of the character written by Marvel.