I can't see any team beating the Patriots at Foxboro and given the likely number 1 seed, the Patriots will be playing the play offs at home.
Ben Roethlisberger is terrible on the road, and has a pretty terrible record against the Patriots in general so the Steelers aren't beating them. Raiders are good on the road but Boston in January is a whole new thing. I don't see the Raiders defense holding out. Chiefs would need Justin Houston and Tamba Hali to play the game of their lives.
The only team I could see beating the Patriots in Boston are the Broncos but they are unlikely to even make the playoffs.
To be honest despite all that, whilst the Patriots are highly likely to win the AFC, they won't win the Superbowl. No Gronk, no receivers besides an over used Edelman, and the daft trade of Jamie Collins I can see them losing badly to the Cowboys in the Superbowl.