THE CASTING:
Michael Jai White as Green Lantern/John Stewart (Green Lantern Corps)
Steve Buscemi as Desaad (Justice League 1 & 2)
Jeff Bridges as Darkseid (Justice League 2)
Heather Graham as Poison Ivy/Dr. Pamela Isley (Gotham City Sirens)
Rosario Dawson as Vixen/Mary McCabe (Gotham City Sirens)
Sam Rockwell as The Riddler/Dr. Edward Nygma (The Batman)
Jon Hamm as Two-Face/Harvey Dent (The Batman)
Morena Baccarin as Catwoman/Selina Kyle (Gotham City Sirens)
Colin Hanks as Jimmy Olsen (Man of Steel 2)
Ben Barnes as Nightwing/Dick Grayson (The Batman)
Jamie Dornan as Green Lantern/Hal Jordan (Green Lantern Corps)
David Suchet as The Penguin/Oswald Cobblepot (The Batman)
Kathy Bates as Granny Goodnes (Justice League 2)
Colin Farrel as John Constantine (Justice League Dark)
Kevin Durand as Swamp-Thing (Justice League Dark)
Tony Todd as Deadman/Boston Brand (Justice League Dark)
Eva Green as Zatanna (Justice League Dark)
James Remar as Jason Blood/The Etrigan Demon (Justice League Dark)
Peter Capaldi as Mr. Freeze /Dr. Victor Fries (The Batman)
Michael C. Hall as Hush/Tommy Elliott (The Batman)
Shoun Toub as Ra's Al Ghul (The Batman)
Alex Meraz as the Red Hood/Jason Todd (The Batman)
Teresa Palmer as Supergirl/Kara Kent (Man of Steel 2)
Benedict Cumberbach as Brainiac (Man of Steel 2)
Alfred Molina as Toyman/Winslow Schott (Man of Steel 2)
Anna Kendrick as Lena Luthor (Man of Steel 2)
Andrew Bryniarski as Lobo (Man of Steel 2)
Channing Tatum as Metallo/John Corben
Denzel Washington as Steel/Dr. John Henry Irons