It may have taken until 1989 for Tim Burton's Batman to kick off the comic book movie era in earnest, but a producer on the film was already thinking about the casting choices a decade earlier—and even mocked up a pic of Jack Nicholson as The Joker.

Ah, the teen comedy! Is there nothing more temporary, more fleeting, and more of its time? Unless, of course, you repurpose footage from those films and turn them into a trailer for what would be the coolest series/film in history—Gotham High.

It shouldn't be surprising that we now have a holiday devoted to the celebration of cats. It also shouldn't be surprising that geeky cat people all over this great land love mashing up their love of felines with their love of all things sci-fi. So to celebrate the festive feline occasion, we've gathered up nearly two dozen sci-fi cats from around the 'net.

Why wait for DC's Justice League movie when you can watch the crimefighters unite right now? Snap to it and check out the...