i think it goes like this:
Done - E3 - Game Announced
Done - ComicCon - Nightwing and Cyborg + Future City announced
15/8/12 - Gamescom - Info and Character Reveals
29/8/12 - PAX - Info and Character Reveals
20/9/12 - Tokyo Game Show? - Info and Character Reveals
7/10/12 - EB Games Expo - Info and Character Reveals
11/10/12 New York ComicCon?- Info and Character Reveals

the ones with the ? at the end im not sure for definite if Injustice is gonna be there.

thx dude

Yup, two reveals within 1 month; YEAH!!!

I completely forgot about PAX. So yeah there could be some reveals there. The only place I would be kind of skeptical of them going is Tokyo.

NYCC is a shoe-in for new reveals.

^Exactly^, Can't wait

Again Martain Manhunter tweets arise, no promises but at least we know he's been on their mind to some level. We all know he'll make it, which I'd almost consider we add him to the Aquaman, Green Lantern, Green Arrow, Deathstroke, Joker, Lex Luthor, Captain Cold, and Doomsday list. Yet again, we never know after seeing Hawkman quickly taken out of the list (only reason I can see is Hawkgirl adding more to the story).