A set of new PS3 trophies for Batman: Arkham City have outed the game's next story-based DLC. Descriptions of the ten trophies imply that the DLC will be called Harley Quinn's Revenge, and that players will control Robin instead of the Dark Knight.
- Lost Property: No crimefighter should be without this
- Breaking and Entering: Find a way into the secret base
- How's It Hanging?: Clean up the Dry Docks
- The Last Laugh: The joke's on who?
- Frequent Flyer: Zip Kick 3 different thugs
- Battering Ram: Shield Bash 5 different thugs
- Snap To It: Snap Flash an unarmed thug, an armed thug, an environmental object and a Titan.
- Bomb Squad: Defuse all bombs in 3 minutes or less.
- A Few New Tricks: Use 5 different Quickfire gadgets in one fight as Robin in Harley Quinn's Revenge.
- Party's Over: Destroy all Harley Balloons.
According to IGN, Harley Quinn voice actress Tara Strong said in January she had done voice work some yet-to-be-released content.