Didn't you hear? THQ have said during a call to investors in the company that they're targeting Devil's Third for a release sometime in 2012 along with Darksiders 2 and Saint's Row 3.
The investors call which came during E3 confirmed the game to be due in 2012 on the Xbox 360 and PlayStation 3.
Devil's Third is a first-person shooter and you can expect hear more on the game over the coming years.