Right now the Pats hold the Strength of Victory tiebreaker. The Pats are 65-85, the Bengals 61-89. If the entire AFC North wins this weekend, and the Pats beat the Texans, the standings would look like this: Cincinnati 75-97, New England 74-96. Since Chicago is playing Detroit, and Atlanta is playing TB, both teams will go 1-1 in those game. Cincinnati 76-98, NE 75-97.
That means these following games could decide the 3rd seed (should the AFC North and NE win).
Green Bay @ Arizona
Kansas City @ Denver
Indy @ Buffalo (counts 2x)
Tennessee @ Seattle
New Orleans @ Carolina
If in those games, 4 of them go the Bengals way (bold teams), they will win the tiebreaker over NE and will capture the 3rd seed. They won't have a 2nd round game against Indy, and they would host NE in the Championship game should both make it. A lot might be on the line Sunday Night, even if NE wins.
*If the whole AFC North doesn't win, or only three of the above games go the Bengals way, and they tie the Pats in SoV, the next tiebreaker is Strength of Schedule and NE will win that.