Rocksteady Studios has officially announced the launch of "Batman: Arkham Knight" in 2014, but GameStop might have accidentally leaked the release date in a new advertisement.

According to the gaming retailer's ad, the title will be released on Oct. 14 for the PlayStation 4, Xbox One and PC. If you pre-order the game from GameStop, you will also have access to DLC that allows you to play as Harley Quinn and four exclusive challenge maps. You can check out GameStop's ad here.

"Batman: Arkham Knight" made its big reveal on the cover of GameInformer on Tuesday, showcasing the Caped Crusader's redesigned batmobile, marking its first appearance in the "Batman: Arkham" series.

"We're excited to be developing the game for next-gen platforms," game director Sefton Hill told The Guardian. "[It] has allowed us to bring to life the design elements that we envisioned from the beginning such as the Batmobile and how it augments Batman's abilities, to the fully detailed and realized Gotham City."

Though GameStop's ad states the release of the upcoming "Batman: Arkham" series is slated for October, Rocksteady has not confirmed an official launch date. You can check out "Batman: Arkahm Knight's" official synopsis and trailer below:

In the explosive finale to the Arkham series, Batman faces the ultimate threat against the city he is sworn to protect. The Scarecrow returns to unite an impressive roster of super villains, including Penguin, Two-Face and Harley Quinn, to destroy The Dark Knight forever. Batman: Arkham Knight introduces Rocksteady's uniquely designed version of the Batmobile, which is drivable for the first time in the franchise. The addition of this legendary vehicle, combined with the acclaimed gameplay of the Batman Arkham series, offers gamers the ultimate and complete Batman experience as they tear through the streets and soar across the skyline of the entirety of Gotham City. Be The Batman.