Either someone at Warner Bros. Interactive Entertainment is in a lot of trouble or someone went through an enormous amount of trouble to create an incredibly elaborate hoax.
An anonymous Flickr posted 20 screenshots from what appears to be Batman: Arkham City, the sequel to developer Rocksteady Studios 2009 smash hit Batman: Arkham Asylum. They are intricate enough to theorize as legitimate and stunning enough to get excited that the sequel could surpass the original. Two-Face, Harley Quinn and Catwoman all look fantastic. The bar has been raised.
Batman: Arkham City isn’t due in stores until over a year from now. If the game looks this good now, imagine what another year of finish and polish can achieve.
Source: Joystiq