User blog comment:Sci100/Batman Beyond Game - The Sequel to Arkham City/@comment-238662-20120820191748/@comment-4050367-20120820222346

Yeah. An Arkham City sequel would be cool. The Superman idea is awesome... but not sure of the villians....

1. Lex Luthor

2. Brainiac

3. Darkseid ( but that's really pushing it )

4. Parasite

5. Metallo

6. General Zod

Other then those 6, I have no idea who else would be villains in the game.