Let's make it official. A lot of you might say things like they would have different move sets and I know that. But if only one (which is probably true) could get in who would you choose and why? Mine is Zatanna because she could have an amazing move set and they could make her look really cool
--- Zatanna, Black Canary, Catwoman, Aquaman, Deathstroke, Green Lantern, Martian Manhunter, Joker and Swamp Thing for Injustice: Gods Among Us
With the initial roster already known to NRS, and the way they already asked us if enough people wanted Dr. Fate then they'd add him to the game makes me think that he's not on the roster but can make the DLC. He just keeps shunning Zatanna no matter whom asks so I think she's in and he don't want to blow her cover.
I'm all for Zatanna and her talking backwards which could easily replace hearing all of MK's Liu Kang noises. She's rather unique/different than any other magic manipulator.