WBIE and DC Entertainment announce plans to release Batman: Arkham City for Windows, Xbox 360, and PlayStation 3 in North America on October 18, in Australia on October 19, and Europe and other territories on October 21. The announcement is accompanied by three new screenshots, and this description of the game:

Batman: Arkham City builds upon the intense, atmospheric foundation of Batman: Arkham Asylum, sending players soaring into Arkham City – five times larger than the game world in Batman: Arkham Asylum – and the new maximum security “home” for all of Gotham City’s thugs, gangsters and insane criminal masterminds. Set inside the heavily fortified walls of a sprawling district in the heart of Gotham City, this highly anticipated sequel introduces a brand-new story that draws together a new, all-star cast of classic characters and murderous villains from the Batman universe, as well as a vast range of new and enhanced gameplay features to deliver the ultimate experience as the Dark Knight.