This is that Derek Cianfrance (Blue Valentine) joint featuring Ryan Gosling and Bradley Cooper.
There have been clips out there for some time, but this is the first trailer since its debut at TIFF. I think most will agree that this is a compelling look at the film- it almost looks like a shared-universe crime flick with Killing Them Softly with some of that cast.
Focus Features has it set for March 29th.