Colts can make it if they win out (NYG and Jax), Denver and/or LAC lose out. Denver plays Cinc and KC, so quite possible; LAC plays Pats and Raiders, so not likely. Indy needs a 3 (or more) team tie at 9-8, which would most likely come from Denver losing out, Cinc winning out, or Miami winning out. Indy wins the tiebreaker in any scenario with 3 or more teams at 9-8.
Bengals can only get in if they win out, Colts and Miami each lose one more, and Denver loses out. KC plays at Denver in the last week, and they will most likely play their backups, but on any given Sunday...