THE CASTING:
Ben Barnes as Terry McGinnis/Batman Beyond
Ben Affleck as Old Bruce Wayne/Batman
Jared Leto as the Joker
John Slattery as Derek Powers/Blight
Kristin Kreuk as Dana Tan
Rhianna as Max Gibson
Keanu Reeves as Damian Wayne/Ra's Al Ghul
Jim Parsons as Dr. Delbert Billings/Spellbinder
Mariska Hargitay as Commissioner Barbara Gordon
Billy Zane as Walter Shriev/Shriek
NOTABLE CAMEOS:
Bryan Cranston as Warren McGinnis
Geena Davis as Mary McGinnis
Margot Robbie as Harley Quinn
Viola Davis as Amanda Waller
Jeremy Irons as Alfred Pennyword
J.K. Simmons as Commissioner James Gordon
Logan Lerman as Tim Drake/Robin
the Jokerz gang