Respawn Entertainment, the company formed by Jason West and Vince Zampella after the duo's famous firing from Infinity Ward and Activision. The studio has trademarked the word "Titan" for use in video games. Beyond this single word, presumably a title, all we've had to go on is a pair of blurry screenshots and one very close-up image of what appear to be a mouse and gun barrel.
Given Zampella and West's involvement with Call of Duty – though West is no longer with the studio – it wouldn't be too surprising if the game ended up being a shooter. Whatever it is, Respawn and publisher Electronic Arts should finally be showing it off at E3 this summer.
One cheeky note regarding Titan: That's also reportedly the code name for Blizzard's next MMO, a game belonging to Activision.