4. Bill Belichick vs. Jim Caldwell
Don't know about you, but we still half-expect to see Tony Dungy on the Indianapolis sideline when the Patriots and Colts square off. But it's been three seasons since Dungy retired as the Colts head coach and moved on to a studio analyst gig (and occasional Rodney Harrison nemesis) on NBC's "Football Night in America'' telecast. He was replaced by the even more low-key Jim Caldwell, who won 24 regular-season games during his first two seasons but is winless this year without quarterback Peyton Manning, whom some might suggest is a Colts coach himself.