Latest trailer for Batman: Arkham City DLC pack Harley Quinn's Revenge, which finds the Clown Princess of Crime running loose in Gotham while Batman is away, leaving only Robin to handle the situation.

Word is that this is a story-driven DLC, with set levels rather than the mostly free-roaming action in the rest of Arkham City. Players will get to control both Batman and Robin at different points in the story, however.

Harley Quinn's Revenge is due out May 29.

[gameinformer.]