It has been rumoured that Harley Quinn will make an appearance in DLC for Batman: Arkham City. Developer Rocksteady isn't willing to confirm the rumour, but it is willing to tease you about it.
The pictured teaser image was released today via the game's official Twitter feed, clearly showing the boots of Harley's Arkham Asylum outfit and her iconic hammer.
Earlier this month a leaked PlayStation 3 Trophies list suggested new Arkham City DLC will be centered around Harley Quinn and let players take control of Robin.
Keep an eye out for official confirmation soon, once Rocksteady's done with the cock-tease that is.