Simple really, it's the Batman Arkham City launch trailer. We've already had a right good play with it (the game that is) and here's something of what we thought:
"The level of madness in there is directly proportional to the level of success of Batman has in the outside world, and judging by the roll call of sociopaths behind Arkham City's walls, the Caped Crusader's doing a pretty good job. Among others, you'll run across the Joker, Two-Face, Mr Freeze, Deadshot, The Penguin, Poison Ivy and others. Kick-Ass would get eaten alive in there, digested, shat out and then eaten again."