E 'recently showed a new trailer for Batman: Arkham City shows us an unusual alliance: there are in fact Batman and the Joker fighting together, side by side, to knock several members of a gang. All this would seem to herald the presence of a co-op in the game: we look forward to a comment by Rocksteady Studios, as you are below the link to the movie. We recommend you view it as soon as possible, as it could be a movie not authorized by Warner and could be removed quickly.

Update: Warner Bros has requested the removal of the link, saying that the movie is not a legal asset or endorsed by DC for a game WBIE ".