Warner Bros. has released a new trailer for the upcoming Batman: Arkham City Harley Quinn’s Revenge DLC.

The DLC features more than two hours of fresh gameplay and will be available to download from May 29 on Xbox 360 and PlayStation 3. No price has yet been announced, however it will come free with the Arkham City Game of the Year Edition – also set to release on May 29.

“The Harley Quinn’s Revenge mission sends players back into Arkham City to face their final challenge as they interchange between playing as both Batman and Robin,” says the publisher. With this being the final piece of DLC for the game, what will the Rocksteady team do next? Will they start work on another Batman game or do they move onto a different IP entirely? We’d love to see the Teenage Mutant Ninja Turtles make a come back.

What do you think is next for Rocksteady?