Jensen Ackles Batman / Bruce Wayne (voice) Darren Criss Superman / Earth-2 Superman (voice) Meg Donnelly Supergirl / Harbinger (voice) Stana Katic Wonder Woman (voice) Jonathan Adams Monitor (voice) Gideon Adlon Batgirl / Kryptonian Voice (voice) Geoffrey Arend Psycho Pirate / Charles Halstead / Hawkman (voice) Troy Baker The Joker (voice) Zach Callison Earth-2 Robin / Robin / Damian Wayne (voice) Darin De Paul Solovar (voice) Ato Essandoh Mister Terrific / Anti-Monitor (voice) Keith Ferguson Doctor Fate / Atomic Knight (voice) Will Friedle Batman Beyond / Kamandi (voice) Jennifer Hale Alura / Hippolyta (voice) Aldis Hodge John Stewart (voice) Jamie Gray Hyder Hawkgirl / Amazon Soldier (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 The Spectre (voice) Matt Ryan Constantine (voice) Keesha Sharp Vixen (voice) Harry Shum Jr. Brainiac 5 (voice) Jimmi Simpson Green Arrow (voice)