Kevin Conroy and Mark Hamill return as Batman and the Joker in Batman: Arkham City. Picking up some time after the events of Batman Arkham Asylum, Dr. Hugo Strange has turned a portion of Gotham City into a prison; housing most, if not all of Batman's villains. Batman and Catwoman are trapped inside Arkham City trying to find out what Strange's plan is, and what the Joker has to do with it. So far I've already fought Ra's al Ghul, Mr. Freeze and Solomon Grundy, not to mention countless goons working for the Penguin, Two-Face and The Joker.
Side quests abound, including searches for Deadshot, Victor Zsasz, and some very interesting puzzles devised by The Riddler. In Arkham Asylum, The Riddler never appears, but antagonizes Batman throughout. Now he's devised some SAW-esque traps for the Batman to solve in order to save innocent lives.
Besides the main story there are also unlockable challenge maps for Batman and Catwoman and there is DLC coming soon that will feature Robin and Nightwing in there own challenge maps. Batman: Arkham City is now available for PS3 and Xbox 360