Unrelated to power scaling and predicting the outcome, had a potentially cool idea of how they could have Ultima appear in the fight.
>Hulk starts out fighting a weaker incarnation of Godzilla
>Manages to kill that one with great difficulty
>Injured, breathing heavily in the rubble, Hulk starts to calm down
>When suddenly, a radio in the rubble turns on
>https://www.youtube.com/watch?v=Ct2eW-NF7Hw
>Red dust starts to sweep in and envelope Hulk
>Ultima's silhouette appears in the red dust cloud
>He opens his mouth and blue rings form as Hulk finally spots him