I couldn't resist, but it's hard to top Sleezy's choices.

GenesisPig's casting for the Justice League movie


Michael Sheen as Martian Manhunter





Jack Huston as Aquaman





Will Smith as Green Lantern (John Stewart)
Idris Elba was my favorite choice for this role, but Sleezy already picked him. I usually hate it when Will Smith's name is dropped for almost any comicbook adaptation, but I have to admit,he won't be a bad choice for this role. Also, it would be good to see him in an ensemble cast for a change.








Lee Pace as Green Arrow






Tom Hiddleston as Flash







Olivia Munn as Wonder Woman






James Badge Dale as Batman







Michael Fassbender as Superman



A good actor with a good sense of presence is enough to make him/her a successful cast, Fassbender is a terrific actor, He might not have the physique to be Superman, but he could still be the best option.
He could portray the existentialist godlike version of Superman that the silver screen demands. Superman is capable of doing anything, his powers are beyond measure, it's always silly to expect him to have him punch the toughest enemies in fights, there's more to him. Someone as capable as him, can't just be a normal Superhero who has to balance 2 identities and fight bad guys.