Starbreeze updated its website last week, incidentally announcing a heretofore unrevealed project, Storm.
"Co-op Sci Fi FPS. It is our future," is the terse description.
A single image shows an industrial-like scene.
Storm may well be to be the long-missing Cold Mercury, which was expected as a free-to-play release following Syndicate's launch in February 2012.
The project was believed cancelled or otherwise significantly altered when the developer's CEO spoke out against free-to-play games.
In the interim, Starbreeze has been fairly quiet. It acquired Payday developer Overkill, and revealed Brothers: A Tale of Two Sons to be the mysterious P13.