At this rate the Chiefs will have nothing to play for in week 18, and the Broncos only need one win.
Another underrated possibility is one of the Dolphins or Colts winning out. Sounds laughable, but if you look at their schedules it is definitely possible. Especially Indy (TEN, @NYG, JAX is about as easy as it gets).
And of course, one Bengals loss in the last 3 eliminates them, and they don't exactly seem to be a cohesive team at the moment.