Crytek UK working on single-player only game?

Crytek UK is going to make an announcement about their next game at E3. As German magazine Gameswelt.de dug up, it might just be a single-player game, pretty much ruling out the possibility of a TimeSplitters 4 or Star Wars: Battlefront 3 which relied heavily on their respective multiplayer modes.

What else could it be, then? A new Haze? Or something completely different?