I think Cancellara is out to win everything he can this year to cement his legacy. I am pretty certain he'll try to launch a characteristic attack near the end.
It does seem highly likely, doesn't it. I've just been watching his 2008 win on youtube and it's a masterpiece of tactical riding. He leaves it until about 1km out then gets a slingshot off another rider's attack, and once he's got a gap, there's no catching him. If he can pull off something like that again, I'll be very happy for him.
Might be hard to escape the likes of Sagan, Kristoff and especially GVA on current form though.
Will be interesting to see how Gaviria does - this is going to be his longest race by a considerable margin, but if he can stick with the leaders until the end, who knows? I suspect it's too soon for him though.