First, the reality, if the Ravens win at least two of their remaining 4 games, they will be AFC North Champ. They are 8-2 in the conference, we are 4-5 . They have two AFC games left, if they lose both of them, they will still win the tie-breaker. Even if the Bengals win out, they would lose a tie-breaker against the Ravens, as they have 3 divisional losses to this point, and the most the Ravens can finish with is 2.
If the Steelers win their remaining four games, they would stand at 11-5 and would be a wild card (at the least). In this scenario, the Steelers could only win the division if the Ravens finished out by only winning once in their final four games. This could give both the Ravens and Bengals (having lost to the Steelers in this scenario) records of 10-6. The Ravens again would win that tie-breaker over the Bengals. Also, by winning out, the Steelers would eliminate the chance of a three way tie for the division crown.
For a three way tie with the Ravens and Bengals, the Steelers would win that tie-breaker against the Ravens IF they beat the Bengals on December 23.
If the Steelers finish winning 3 of their final four, they would stand at 10-6 and would be a wild card (at least) if one of those wins comes against the Bengals. If not, it would be possible for the Bengals to finish one game ahead of us, either giving them the division crown (if they win out) or a wild card spot (if they finish above us). However, if the Steelers beat the Bengals, and that is Cincinnati's only remaining loss, and the Ravens finish off winning only once, then they will all finish at 10-6, and the Steelers win the division, the Ravens would finish in 2nd and the Bengals in 3rd.
If the Steelers win 2 of 4, they could win the division, be a wild card, or be home watching the playoffs. Yup, they could finish at 9-7 and win the division....... Baltimore loses all 4, Pittsburgh has to beat Cincinnati and one other (it won't matter who) and Cincinnati loses to either Dallas or Phiily. This gives everyone a 9-7 record, and the Steelers the division and the Ravens finish 2nd.
If the Steelers win one game they can't win the division, but if they beat the Bengals, Cincinnati would have to win their remaining 3 games to beat us out of a playoff spot, as we would hold the head to head against them. Whether or not any other team can step it up to finish at least 3-1 remains to be seen.
Ravens win two games they win the division, no matter what.
We have to beat the Bengals.
PS. Before I get replies concerning the three-way tie-breaker.
1) They can not all finish at 11-5, the Steelers and Bengals play each other, one of them will lose, or tie, so 11-5 is not possible for all 3 teams.
2) Under the 10-6 scenario, if the Steelers beat the Bengals, and all 3 teams go on to finish 10-6, it would be impossible for the Ravens to have gone on to defeat the Bengals the last game of the year, that would have been the Bengals 7th loss.
3) Under the 9-7 scenario, it would be impossible for the Ravens to beat the Bengals the last game of the year and still finish at 9-7.