So, in that case the possible options would be (assuming the Bills do play in Wk 18):
KC W: 0.823 T: 0.794 L: 0.764
BUF W: 0.812 T: 0.781 L: 0.75
CIN W: 0.75 T: 0.718 L: 0.687
In that case:
1) Bengals vs Ravens is meaningless (Ravens cannot exceed 0.687 Win%)
2) Bengals cannot win the #1 seed
3) Bengals cannot get the #2 seed unless Buffalo loses and they win ... I think they take the tiebreaker on division W/L % but not sure.
4) Chiefs are in the driver's seat for #1 and only lose it with a loss or tie plus a BUF win.
This is OK, it is more balanced between the Bills and Bengals than a forfeit of course, but it is defensible.