(CNN) -- One Harbaugh will win Super Bowl XLVII. Another will lose it.
That much is guaranteed after the San Francisco 49ers, coached by Jim Harbaugh, and the Baltimore Ravens, led by his brother John Harbaugh, beat their respective foes in conference championship games Sunday. Those wins mean the Harbaughs will be the first siblings to face off as head coaches in the NFL's title contest and, in fact, for any major U.S. professional sports championship.
Both teams rallied from halftime deficits on the road to earn berths in the Super Bowl, which will be played February 3 in New Orleans.
Baltimore did it by reeling off 21 straight points to overcome Tom Brady and the New England Patriots. It was sweet revenge for the Ravens, who lost last year's nail-biter AFC Championship to the same Patriots foe on the same Gillette Stadium field in Foxborough, Massachusetts.
A few hours earlier, the 49ers rallied from a 17-0 hole to defeat the Atlanta Falcons, who had posted the best regular season record in the NFC.
John Harbaugh joked to reporters, after the Ravens' win, that he and his brothers had a "few dreams" -- one of which may have been meeting up in the Super Bowl -- as well "as a few fights ... just like all brothers."
"We'll let the two teams duke it out, as much as possible," John Harbaugh said, smiling.
The Baltimore coach then made a point to talk about how proud he was of his brother Jim, as well as how much he admired the San Francisco team.
"I'd like to think that when you look at (the) two teams, you're looking at mirror images," John Harbaugh said, referring to the Super Bowl foes. "It's going to be a great football game."
Baltimore's dominant second half leads to win
Beyond their recent playoff history, Baltimore and New England matched up earlier this season -- one in which the Ravens came back from a late 9-point deficit, winning on a last-second field goal by Justin Tucker.
Still, victory Sunday evening was hardly guaranteed.
New England had the superior regular record, not to mention a storied playoff pedigree having played in five Super Bowls in the past 11 years. They also had Brady, who last Sunday passed Joe Montana as the quarterback with the most playoff wins ever.
And the Patriots started out strong, jumping to a 3-0 lead and -- after a Baltimore score -- entering halftime up 13-7.
But the second half was all Baltimore. The Ravens scored touchdowns on their first three possessions, two of them on Joe Flacco touchdown passes to receiver Anquan Boldin.
Meanwhile, the vaunted Patriots offense sputtered, hurt especially by a Stevan Ridley fumble and two Brady interceptions. Baltimore ended up winning 28-13.
"We came here last year and left with a bitter taste in our mouths," Baltimore's Boldin told reporters after the game. "We felt like this team took something away from us. And we wanted to come back and make that right."