This article over at Gameplayer reveals the immense amounts of pressure that Rockstar are under to deliver on GTA IV's DLC and the role it will play in shaping fanboy wars over the rest of this generation.
"Is GTA IV the most anticipated game of all time? Quite possibly, and you would think that with such great expectations would come immense pressure to perform. But strangely this is not that case. Through a carefully orchestrated procession of hands-on demonstrations, much of the world's specialist games media has already established that the title is beyond awesome. This is Rockstar after all. Strangely though, and in a sign of the times, there is more pressure on GTA IV's DLC than there is on the game itself."