There's no official word from publisher Warner Bros. but a Microsoft product listing may have outed the next Batman's release date.
Rocksteady’s Batman: Arkham Knight was earlier this month delayed from its late 2014 release date to some time in 2015.
Now a US Microsoft Store listing says that the game will in fact be released on February 24 in the US. That’s for Xbox One, although you can presume – if indeed the date is correct – that it’s the same for other formats.
The date has been live on the website for some time no without being removed, for what it’s worth.
An Arkham Knight video released during E3 suggests the game will be one of the best looking titles ever, with the big new feature being a drivable Batmobile, as well as a brand new Gotham City to explore.