There's been a glut of launch trailers released this week (which means there's a glut of games on the way in the next few days). The latest to land on the site is the trailer for Batman: Arkham Origins, third of the Arkham games, but the first by Warner Bros. Games Montréal. The game, a prequel to events that took place in Arkham Asylum and Arkham City, is set to release on October 25 on PS3, PC, Xbox 360 and Wii U.