With the game out in a matter of days, 2K has been ramping up the marketing for BioShock 2, culminating in this, the game's launch trailer.
If you saw it already on Jimmy Fallon, great. He's a funny kid, deserves the viewers, doesn't deserve the flak he gets. If you haven't already seen it though, click on!
I'll warn you ahead of time, though: continuing a tradition begun during the first game's marketing, there's fake gameplay footage in there. Why they couldn't just include real gameplay footage, I don't know.