Warner has detailed the Harley Quinn DLC for Batman: Arkham City.
First confirmed via a trailer for an upcoming Game of the Year Edition, Harley Quinn's Revenge is being billed as the game's "final chapter".
Featuring over two hours of fresh gameplay, it'll be available to download beginning on May 30 on PS3 and Xbox 360. Pricing has yet to be confirmed.
Warner says: "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 utilise each of the characters' unique combat and investigative skills to uncover Harley's vengeful plan and shut the gates on the urban mega-prison forever. In addition to experiencing a new storyline, fans can explore new environments and face-off against Harley's all new gang of thugs."