Yea undefeated is a long shot. But the Patriots are easily favored in all those games.
This is where your bias is showing (I'm biased for Denver which improved greatly this offseason IMO). Those are all legit teams and I wouldn't say it was "easily" a thing at all.
If I had to guess I say the Pats finish 13-3 and land the #1 seed
Pittsburgh, Denver, Oakland and K.C. all make it as well.