Rockstar posted a new image on the Batman: Arkham City Facebook page teasing what appears to be new Harley Quinn DLC.
As you can see from the image, it contains Quinn's boots and her signature hammer.
This isn't the first we've heard of the upcoming DLC. Earlier this month, some leaked PS3 trophies suggested the next Arkham City DLC would center around a Harley Quinn themed mini-campaign that might let players take control of Robin. A name for a new challenge map, titled "Harley Quinn's Revenge" pretty much confirms this is what the DLC will be.
Will the clown queen be the next DLC to come to Arkham City? We should find out soon!