aside from the confirmed characters i think we are starting to get a feel 4 whos in.
Confirmed officially
Batman
Flash
Superman
Grundy
Harley quinn
Wonder Woman

Unoficially Confirmed
Aquaman
Nightwing
Green Arrow
Deathstroke
Lex Luthor
Joker

Most likely in due to new 52/popularity/

Cyborg
Green Lantern (stewart)
Lobo
Captain Cold
Sinestro
Black Adam

my wild card 8

Captain Comet: He would look awesome and NRS could make him play well. Great addittion

Huntress: DC Universe Online she was kick ass she would fit in perfectly here.plus we need more chicks

Raven: we need more chicks and another Titan

Grodd: we need another powerhouse to fight Grundy

Hawkman/woman either or is fine with me or even have them as a team like Noob Smoke in MKD

Braniac: He, Luthor, Sinestro, Black Adam, Deathstroke, Captain Cold, and the next guy could form the NRS Injustice Leaugue

Mirror Master: MKO fav good tie in to story

Exclusives
360: Martian Manunter, Black Lantern alt for Green Lantern (scorp)< lol jk
PS3: Bane, Bizzaro alt 4 superman (sub)
DLC

Atrocitus
Scarecrow
Rorshac
Dark Seid
Killer Croc

that leaves a good 32 with Doomsday as unplayable boss and optional guests Kano and Spawn what do you guys think? your opinions much aooreciated as well as your DLC/Wilcard/and most likely + exclusives if you want