Evolve Developer Working on New Game

Turtle Rock Studios, the developer behind Left 4 Dead and Evolve, is working on a whole new game.
The news comes from a job listing on the studio's website for an animation programmer. The position is for an "unannounced new" intellectual property described as a "cutting edge game targeting next generation hardware."
It's difficult to make any sort of guess as to what the new game will be. However, among the responsibilities for the open job position is the need to "deliver excellent combat