On Saturday, the Atlanta Falcons will head to Philadelphia for a divisional playoff game against the winners of the NFC East. On Sunday, the Saints will head north on Sunday as well to face the NFC North-winning Minnesota Vikings in the other NFC divisional contest. Should both the Falcons and Saints prevail, the following weekend's conference championship game would be an all-NFC South affair.
It's uncommon for two teams from the same division to meet in their conference's title game. Since the NFL expanded to 32 teams and realigned into eight four-team divisions in 2002, it's happened just three times.