The Cowboys, Seahawks, Packers, and Cardinals are NFC teams going to the playoffs. In the AFC the Steelers are going. If the Steelers make it to the Superbowl, they will be the only AFC team that will be participating in a rematch regardless of which of those NFC teams makes it to the Superbowl.
yes, that;s an interesting fact. and to tell you the truth I would not be surprised to see Pittsburgh in another superbowl. a second matchup with seattle would be a great game.