The Broncos are the Superbowl champs and yet their over/under is 9 in Vegas.
Tom Brady will be 39 at the start of the season (whenever that is for him)
The Seahawks lost their bellcow back and are coming off a disappointing season for them, paying Wilson $20mm isn't going to help.
The Packers had a disappointing year and Rodgers looked human at times.
The Cardinals won 13 games, but Palmer looked awful in the playoffs. He is 36, how much longer does he have?
The Panthers looked unbeatable, until they lost handily in the playoffs. They let Norman go. Is Cam the next great QB?

For years the AFC was ruled by Manning and Brady (16 times their teams have been to the AFC title since 2001, 14 times for the rest of the league combined). Now Manning is gone and Brady is 39 and looking at a 4-game suspension. Drew Brees? Not really a factor anymore in the NFC. The Packers? I would expect them to rebound, but that was not a good year in 2015. The Seahawks? Should have lost to Minnesota in the playoffs after a 10-6 year?

I am not sold on the Panthers, time will tell what they do. The Steelers will be better if they can actually play defense, although losing Bryant doesn't help.

More question marks than answers for most teams, if I were a betting man I would probably bet on one last run for Old Man Brady. Then again, it is the NFL and who knows?