Guest Stars Bruce Greenwood voices Batman Troy Baker voices Brion Markov / Geo Force Greg Cipes voices Beast Boy / Garfield Logan David Kaye voices Vandal Savage Mark Rolston voices Lex Luthor Alyson Stoner voices Barbara Gordon / Oracle Stephanie Lemelin voices Computer Tara Strong voices Tara Markov / Terra Nolan North voices Superman / Clark Kent Fred Tatasciore voices Slade Wilson / Deathstroke Maggie Q voices Diana Prince / Wonder Woman Nolan North voices Frederick DeLamb / Baron Bedlam Troy Baker voices Green Lantern / Guy Gardner Yuri Lowenthal voices Zviad Baazovi Fred Tatasciore voices Metamorpho Troy Baker voices Tod Donner Yuri Lowenthal voices Garth David Kaye voices Elongated Man / Ralph Dibny