The worst scenario for many Colts fans is that Peyton Manning AND Robert Griffin III are rock stars for the next five years while Andrew Luck bombs. I don't see it happening, but Nate Dunlevy runs down the doomsday scenarios just in case:
There are basically three believable ways that Andrew Luck can fail. Obviously, he could wig out a la Jeff George or Ryan Leaf, but not even the Devil is going to try to convince you that's going to happen. No, Luck is about as sound as a gold-backed greenback.