You don't want to take over the universe. You wouldn't know what to do with it beyond shout at it.
You want weapons? We're in a library! Books! The best weapons in the world!
Never run when you're scared. Rule 7.
I'd forgotten not all victories are about saving the universe.
I hope I won't become hated by geeks everywhere, but I don't really know comic books all that well.
Writing for adults often means just increasing the swearing - but find an alternative to swearing and you've probably got a better line.