Kevin Conroy Batman / Bruce Wayne (voice) Susan Eisenberg Princess Diana (voice) George Newbern Superman / Clark Kent (voice) Carl Lumbly J'onn J'onzz / Martian Manhunter (voice) Max Brooks Howie (voice) Maria Canals-Barrera Hawkgirl / Shayera Hol (voice) Phil LaMarr Green Lantern / John Stewart / Rioter (voice) Gary Cole J. Allen Carter (voice) Michael Rosenbaum The Flash / Wally West / Protester (voice) Jason Marsden Snapper Carr / SCU Officer (voice) Kevin Michael Richardson General Wells / SCU Officer / Squadron Leader (voice)