No longer just a leaked rumor
Injustice: Gods Among Us keeps on rolling with its DLC, with Lobo (available on May 7th), and screenshot confirmation of the existence of Batgirl. It seems as if in an intrepid user was able to uncover her within the in-game DLC menu, before it was subsequently pulled.
So it looks like that leak is two for two at this point, correctly identifying Lobo and Batgirl. Now it seems that Zodd and Scorpion will be on the way at some point, evening out the final half of the Season Pass. I feel...fairly underwhelmed by this offering so far.
Batgirl [Event Hubs]