Rather than scenarios for each team, I'll try to put the overall picture into something that (hopefully) resembles English. Just looking at teams, not seeding.
6 Divisions have been clinched: Patriots, Texans, Broncos, Packers and Falcons.
The Ravens will win the North unless they lose out (Giants, @Bengals) and the Bengals win out (@Steelers, Ravens).
Same as above. The Niners win unless they lose their last 2 (@Seahawks, Cardinals) and the Seahawks win their last 2 (49ers, Rams).
Giants cannot win the division on a tie breaker because of their 3 division losses, therefore they can only take the division if they win out and the Cowboys and Redskins (who play each other in week 17) each lose a game. If that doesn't happen, then the winner of that week 17 game at Washington wins the division no matter what (so if the Giants lose either of their last 2 games, the Cowboys and Redskins week 16 games are completely meaningless).
There are only 3 teams left: Colts, Bengals and Steelers. Technically it could be any 2 of the 3, but realistically it's going to be the Colts and the winner of the Bengals @ Steelers.
The Colts haven't clinched, but I'm a little shaky on how they could miss the playoffs. I think the only way it could happen is if they lose their last 2 (@Chiefs, Texans), the Steelers win their last 2 (including week 16 vs Bengals), the Bengals beat the Ravens and the Bengals make up 3 games in strength of victory.
If the Bengals win in Pittsburgh this week, the Steelers are out and the 6 AFC teams are set. If the Steelers win, they are in with either a win (Browns) or a Bengals loss (Ravens). The Bengals could lose this week and still get in with a week 17 win and either a Steelers loss or the above scenario where the Colts don't make it.
There are currently 22 NFC teams with 8-6 records. If you can figure it out, let me know.