“I’ve got to go back and help,” says Cable, and the audience asks: Help with what?
I mean, the way I understand the current scenario, Agent Cable has completed her primary mission. She’s trying to prevent a magic spell from falling into the wicked hands of a sinister wizard, and the spell is written down in a little red leather notebook, which is the only place to keep anything. Cable currently has possession of the notebook, and the bad guys are busy having stupid boat fights with a big green monster, so this would be an opportune time for Cable to start looking around for some car keys. Cable wins, bad guys lose. End of movie.
Superheroes Every Day 