Here's the voice acting...
The slate of talent for JUSTICE LEAGUE HEROES will include: Ron Perlman (Hellboy, Blade II, Justice League TV series) as Batman; Michael Jai White (Spawn, Spawn: The Animation) as Green Lantern; Crispin Freeman (Viewtiful Joe, Kingdom Hearts II) as Superman; Courtenay Taylor (God of War, Call of Duty 2: Big Red One) as Wonder Woman; Chris Edgerly (Drawn Together, Chicken Little) as The Flash; Kari Wahlgren (The Wild, Steamboy) as Zatanna; and Daniel Riordan (Transformers: Robots in Disguise, Star Trek: Enterprise) as Martian Manhunter. Portraying select villains will be Peter Jessop (Spawn: The Animation) as Brainiac and Carlos Alazraqui (Reno 911, Duck Dodgers) as The Key. Additionally, Ralph Garman (Family Guy, KROQ-FM Los Angeles' Kevin & Bean morning show, The Joe Schmo Show) will voice Green Arrow, one of the game's special unlockable super heroes.