I've long wanted to see a live action team up between Superman and Batman, so I'm pretty excited about the possibilities for this new movie. Despite the fact that a lot of superheroes made guest appearances on the show "Smallville," Batman is one of the few who didn't appear, so this will be new territory.
I've read that a movie about the DC Comics character the Flash is also in the works, as well as a Justice League movie, which would presumably feature Superman, Batman, and the Flash. So far, there's been no word yet on a Wonder Woman film, though, which is a surprise to me since I'm almost sure that she'd be included in a Justice League movie. She is, after all, the most well known female member of the team.