I think there's a reasonable chance that Jim and John Harbaugh will face each other again in another Super Bowl one day. Both are young Coaches. Both the Ravens and the 49ers have young talent that can keep the SB-competitive for another decade. And there's always the possiblity that one (or both) of the Harbaugh's move on to another team and face each other representing other teams. But to think that this will never again happen in the NFL isn't realistic.