: Major US retailer GameStop has listed Batman: Arkham Knight's release date as October 14, 2014. October 14 is a Tuesday -- the traditional day games are released in the US -- indicating this isn't a placeholder, but the actual release date. Steam also lists the release date as October 14.

: Following the earlier leak, Game Informer has gone live with its cover reveal of Arkham Knight.As you'd expect, the accompanying write-up corroborates much of what we said below. The Batmobile is explained as a "core element" of gameplay, which means a new area of Gotham larger than Arkham City will be revealed, including wider streets to accommodate the vehicle.An accompanying video also explains the game takes place a year after the events of Arkham City. Game director Sefton Hill also says, "This is the natural end for the story. We really want to go out in style."More details will be revealed in due course, which we'll be sure to keep you abreast of.Original story follows.

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The since-removed GAME listing. (Courtesy of VideoGamer.com)

Sleuths at website VideoGamer.com discovered a listing for a game called Batman: Arkham Knight on the website of British retailer GAME. It appears that developer Rocksteady has indeed been working on a new Batman game, and it will launch later this year.According to VideoGamer.com, the listing notes that Arkham Knight is the “explosive finale” to the revived Batman videogame series started by Rocksteady with 2009’s Batman: Arkham Asylum. Scarecrow, Penguin, Two-Face, and Harley Quinn are confirmed villains that will appear in the game.Interestingly, the GAME listing also purportedly talks about “Rocksteady’s uniquely designed version of the Batmobile, which is drivable for the first time in the franchise.” It seems that the Batmobile will be usable in addition to the normal exploration found in previous iterations in the series (such as the ability to “soar across the skyline of the entirety of Gotham City”).It was only days ago that word of a new Batman game started to leak via promotional items sent to game stores. It has long been rumored that Rocksteady was working on a next-gen Batman game, however, as WB Montreal took over Arkham duties with 2013's Batman: Arkham Origins, conceivably to give Rocksteady time to work on its new title.The game is reportedly targeting PlayStation 4, Xbox One, and PC. We hope to have more information for you very soon.

Colin Moriarty is IGN’s Senior Editor. You can follow him on Twitter.