This time Bioshock 2, which interestingly didn't have the "Sea Of Dreams" subtitle of the original trailer.

The game looks extremely similar to the original Bioshock, right down to the HUD and narrative. However, the footage that is teased is a good reminder of why the original game was so good. There's a lot of explosive action and a return of the beautiful water effects of the original game.

There's not much else we can say though, really. It's Bioshock 2.