Officially announced today, "Batman: Arkham Knight" marks the return of series developer Rocksteady and will be the final installment in the Arkham franchise. Game Informer posted the game's debut trailer earlier that teased Batman's latest (and perhaps last) adventure, but only suggested a 2014 release. Now, thanks to the pre-order page from GameStop, we can see "Arkham Knight" will be released on October 14th for the PS4, Xbox One, and PC. There's also more details on the Harley Quinn pre-order bonus, which was seen when the game was leaked by GAME.co.uk. Instead of battling against Joker's twisted girlfriend, like in the Harley Quinn's Revenge DLC for "Arkham CIty," you'll actually be able to play as her in four challenge maps.
No collector's edition of "Batman: Arkham Knight" has been announced, but considering past releases of "Arkham" games, one will likely come our way.