2K games has announced that it will be delaying the release of Bioshock 2 and bringing in some help for art and design (Making it 4 studios working on this one title).
Also to be delayed are Max Payne 3, Mafia II, and Red Dead Redemption.
No dates have been nailed down as of yet but I have been told to expect a release of these titles sometime next year (way to be vague PR guy).