Raven has been confirmed to be in the game, I still do not know if she is going to be a playable character or not.
An image of Raven in OXM has been added to the story. Ed Boon has jumped on Twitter to state that while a character may be visible in story mode it does not necessarily make them a playable character. The description below seems to still confirm Raven, though.
It seems the Official Xbox Magazine wanted to jump on the train of hinting at characters in Injustice: Gods Among Us.
In issue 95, Raven is hinted as a playable character.
There's also an exclusive Injustice: Gods Among Us hands-on. New to Gods Among Us? It's one of those man-punching games, created by Mortal Kombat bods NetherRealm, and includes the pick of famous faces from DC Comics - Batman, The Joker, Nightwing, Lex Luthor, Bane, Wonder Woman, Catwoman and Superman, together with minor Justice Leaguers like Cyborg, Raven and Captain Marvel. Blood there is none, but punching there is much.
Thoughts on this?