A new trailer for the upcoming Batman: Arkham Asylum was included on the DVD/Blu-Ray release of The Dark Knight (check it out below). The game is in development at Rocksteady Studios - a North London developer whose only previous effort is Urban Chaos (PS2/Xbox) released in 2006. It remains to be seen if Eidos will still be Eidos (or SCi) when the game is released as the race is on to buy the struggling British publisher.