I think it is still too early to peg the Chiefs, Broncos, and Raiders all teams to win 10+. They are all solid teams but they play against one another. Also, I really do not think the Broncos offense continues its current efficiency on offense. Chiefs are not really a deep team and throughout the season if a few injuries pile up I can honestly see them being an 8-8 team. Raiders are the safest team but they still have secondary issues and will not win every shoot out, they fell on the right side of wins a lot last season I could see them struggling against some play off teams.
I think in reality only 2 of these teams make the play offs because they play each other twice a season. But looking right now it seems we are competing against the Steelers for the division, and one of the Chiefs/Broncos/Raiders, the Miami Dolphins, and the Texans/Titans.
We play most of those teams head to head this season so those AFC Conference games will be HUGE this season.