Jensen Ackles Batman / Bruce Wayne (voice) Darren Criss Superman / Clark Kent / Earth-2 Superman (voice) Meg Donnelly Supergirl / Kara / Harbinger (voice) Stana Katic Wonder Woman / Superwoman (voice) Jonathan Adams Monitor (voice) Gideon Adlon Batgirl (voice) Geoffrey Arend Psycho Pirate / Charles Halstead / Hawkman (voice) Troy Baker Joker (voice) Zach Callison Robin / Dick Grayson (voice) Darin De Paul Solovar (voice) Ato Essandoh Mr. Terrific / Anti-Monitor (voice) Keith Ferguson Dr. Fate / Atomic Knight (voice) Will Friedle Batman Beyond / Kamandi (voice) Jennifer Hale Alura / Hippolyta (voice) Aldis Hodge Green Lantern / John Stewart (voice) Jamie Gray Hyder Hawkgirl (voice) Erika Ishii Doctor Light / Dr. Hoshi / Huntress (voice) David Kaye The Question / Satellite (voice) Matt Lanter Blue Beetle (voice) Liam McIntyre Aquaman (voice) Lou Diamond Phillips Spectre (voice) Matt Ryan Constantine (voice) Keesha Sharp Vixen (voice) Harry Shum Jr. Brainiac 5 (voice) Jimmi Simpson Green Arrow (voice)