Guest Stars Bruce Greenwood voices Batman Zehra Fazal voices Violet Harper / Halo Troy Baker voices Brion Markov / Geo Force Grey DeLisle Griffin voices Helga Jace Greg Cipes voices Beast Boy / Garfield Logan Jason Marsden voices Bart Allen / Kid Flash / Impulse Mark Rolston voices Lex Luthor James Arnold Taylor voices G. Gordon Godfrey Mae Whitman voices Wonder Girl Maggie Q voices Diana Prince / Wonder Woman Freddy Rodriguez voices Eduardo "Ed" Dorado, Jr. / El Dorado Bruce Greenwood voices Eduardo Dorado Sr. Zehra Fazal voices Wendy Jones / Windfall James Arnold Taylor voices Barry Allen / Flash Grey DeLisle Griffin voices Troia Zehra Fazal voices Cassandra Savage Mae Whitman voices Helena Sandsmark Geoff Pierson voices The Flash / Jay Garrick Grey DeLisle Griffin voices Lia Briggs