A remastered version of 2010's Bulletstorm appears to be in developement, according to assets found on an E3 assets disc from Microsoft.
As found by Polygon journalist, Nick Robinson, the drive features a folder titled "Bulletstorm Remaster." This folder contrains four screenshots and a hero image that features the cast of the original game. There are also three 4K-resolution screenshots of environments from the original game.
No mention of such a game was made during Microsoft's or EA's E3 conference. And developer People Can Fly has not mentioned that this title is in the works. Perhaps we will hear news about this remaster in the coming days.