It's way to early. Last year the Bills beat down the Chiefs who were reeling. Fast forward to the playoffs and KC has home field advantage.
Say the Bills lose to the Chiefs. That makes us 4 - 2 going into the bye having played 5 teams with either winning records or at minimum are 500 (Chiefs, Titans, Rams, Dolphins & Ravens). Four of those six games will have been played on the road. And throughout this time the Bills have been hit with all sorts of injuries to key players.
If we remain relatively healthy after the bye a 9 - 2 or even 10 - 1 run seems probable to me.