NetherRealm Studios has revealed that Batgirl will be one of Injustice: Gods Among Us' four planned DLC characters. The announcement was accompanied by an admission that "the bat's out of the bag," referencing the fact that a listing for Batgirl had onto the Xbox Live Marketplace hours beforehand.
We're assuming that this is the Barbara Gordon version of Batgirl, on account of her flowing red hair and the fact that Gordon is the current Batgirl of the New 52 mythos. We're not really sure what's up with her outfit, or the metal clubs attached to her arms, but we figure we'll learn more as gameplay footage is released next week. No word yet on when Batgirl wil be available.