Batman: Arkham City is showing no signs of slowing down, even though it released late last year. A significant DLC expansion entitled Revenge of Harley Quinn has been in development for a while now, and a Game of the Year Edition was recently announced to include it, along with all of the rest of the DLC released for the game. Today, Warner Bros. Interactive and Rocksteady Studios released a teaser trailer for Revenge of Harley Quinn, promising a dangerous new adventure for Batman and his partners.

Although the teaser itself doesn't show off too much, it's still worth watching just to see the changes that have been made to Harley's character. She's in a different outfit now with different makeup, suggesting a more sinister and vengeful persona having wormed its way into her mind after the events of the last game. It looks like Harley and her goons will be just as troublesome for Batman as the Joker was in Arkham City proper. 

Check out the trailer embedded below, and let us know what you think in the comments. Are you looking forward to putting on the cowl one last time, or are you done with Arkham City?