I think the most interesting matchup though would easily be GB vs. Denver.
If Tim Tebow led a 1-4 team that had thrown in the towel all the way to the Super Bowl to face the 18-0 Packers the Super Bowl would get more national and global attention than it has in the history of the NFL.
And then IF the Broncos ended up winning in the ways they have been doing they would probably become the biggest single season story in the history of professional sports.