The game was originally set to be release on PC, PS4, and Xbox One later this year, but earlier this month it was delayed to 2015.
Publisher Warner Bros. has yet to officially announce a new Arkham Knight release date. However, Bruce Wayne and the Dark Knight voice actor Kevin Conroy also recently pointed to an early 2015 release, claiming in an interview that the game will arrive in January.
The "explosive finale" to Rocksteady's Arkham trilogy takes place one year after the events of Arkham City, with Batman at the very peak of his powers, when a gallery of villains descend upon Gotham and team up to bring the Dark Knight down once and for all.
The main villain has been revealed as the Arkham Knight, a character unique to the game's universe that was created by Geoff Johns, writer of Green Lantern, Aquaman and Justice League.
The Arkham Knight character has been pitched as a rougher, more extreme, militarised version of Batman.
Rocksteady's Sefton Hill previously said the studio is aiming to take the fantasy of being Batman "one step further" in the sequel.
"The Arkham games have always been about providing that power fantasy, about being and feeling like Batman," he said. "We're going to take it further with the addition of the Batmobile and the bigger city."
"We've known it's what people want. When you're Batman you do think Batmobile, It's the one key thing we felt we really always wanted to do. And also that refreshes the whole experience, which I really think it does," Hill continued. "What we're always trying to do is [make] every game feel like a new game rather than another episode of the last one."