The first Kick-Ass movie hasn't even hit theaters yet, but so terrific is the buzz for this comic-turned-movie that the filmmakers are already saying the sequel is a sure thing. As for what happens in the second movie, just watch the first: a teaser for the sequel is part of the ending.
Mark Millar, the writer of the comic book series, gave an interview to MTV recently and talked about the prospects of a sequel. He said that, "The series ends on a teaser for the next one, and the movie ends on that teaser, too." Think the ending of Back to the Future: "Roads? Where we're going, we don't need...roads."
As for which studio will distribute the sequel, that's another issue altogether. Kick-Ass is a Marvel property and, by extension, that means -- at least at some point in time -- it's going to be a Disney property. The first film is getting distributed by Lionsgate.
One way or another Millar is extremely confident of the sequel. He said, "We don't want to sound too cocky, but we know this is good. It didn't cost that much money to make. There will definitely be another one."
This is definitely a good thing. And it's also raising the anticipation for the release of the first movie. When's this thing hitting theaters already? They're going to have the next five movies planned before we've even seen ten minutes of the first!