They say, defense wins championships, but I don't see a Von Miller, L.O.B scenario this season.
In the AFC, I like the Patriots to go to the Superbowl. Good balance between defense and offense. They lost Collins, but they still have a solid secondary and the offense speaks for itself I don't trust Andy Reid that much although KC offense and defense played well. Steelers do have a great offense, but their defense can be really horrible at the times.
In the NFC, I'm undecided, but I would choose between Packers and the Giants. Seahawks are having hard time with the O-Line and they lost Thomas, Falcons have a great offense, but I don't trust their defense. Cowboys may well be out quickly, since it's an extra pressure on Elliott and Prescott as they are rookies. And I can't say much good about the Cowboys defense.