Warner Bros. has released a new piece of artwork and some details for the upcoming Arkham City DLC, Harley Quinn’s Revenge.

The content features two hours of gameplay and will be available to download May 30. Here’s what the publisher has to say about it:

“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. Gamers must utilize each of the characters’ unique combat and investigative skills to uncover Harley’s vengeful plan and shut the gates on the urban megaprison forever. In addition to experiencing a new storyline, fans can explore new environments and face off against Harley’s all-new gang of thugs.”

This DLC adds the final piece to the game’s story, so if you really want to know what happened in Arkham City, you need to get this. However, it does open up the whole can of worms regarding paying for ending DLC. If you want the content, buy it; if it offends you, then simply ignore it. Still, Rocksteady did ensure that Arkham City had a definitive ending, so you can afford to miss this extra piece if you really don’t want to pay for it.