Warner Bros didn’t release a game to coincide with the release of The Dark Knight, which may have been a good move considering games based on movies tend to suck a little. However, we now have the trailer for Batman: Arkham Asylum, which will no doubt furfil the needs of people who need a bit of Batman in their gaming lives. The game will be based on the 70-year Batman series as a whole rather than being tied to any particular adaptation.