Playing the role of Barbara Gordon ... do you really want to know?

We have an autographed version of this Batgirl photograph.

Yes, we're talking a possible Major Spoiler for "Batman: The Dark Knight Rises." But do not worry - we promise not to give anything away until after the jump.

Everyone knows the main characters - Christian Bale returning as the Caped Crusader and Gary Oldman as Gotham City Police Commissioner James Gordon. If you've been paying any attention at all, you know Anne Hathaway appears as Catwoman and the villain is Bane, portrayed by Tom Hardy.

But the folks at The Dark Knight Rises Rumors - WARNING: Clicking that link will reveal the surprise, too - have been busy digging a little deeper. Evidence suggests that the film will introduce another character from the comics - Barbara Gordon, daughter of the commissioner. She's also Batgirl, of course (if you consider that a spoiler, turn in your cowl right now). And, later, she became Oracle.

What leads the people at Rumors to this conclusion? The photograph of a trailer door on the New York City set.