I don't necessarily project them to win or even go to the SB, but the Bills have had a major upgrade of talent this off season. They will at least be in the wild card race. The Raiders have a lot of talent, but I don't think that a coaching change is the best thing that can happen to a team with playoff aspirations. New England will probably falter, but can't be counted out of the mix. The Steelers are very strong, but I don't know that Stewart has enough ability to take them all the way. I think there is a price top pay when your offencive coordinator has to run a dumbed down offence. I don't know if the talent is there yet, but KC will be better.
In the NFC I don't see anything about the Rams that will prevent their return to the Super Bowl, but the AFC race is wide open.