I don't think that's reasonable. What if he plays well enough to win the division, but doesn't due to tiebreakers, fluke plays, ect,? The bills could win 10 or even 11 games and still miss the playoffs due to other factors. Look at how many times this has happened in the NFC. If i remember correctly (i didn't bother to Google it) a team won their division with a 7-9 record while a 10-6 team went home.
Good to great consistent play sustained over 5 or more years would be enough for me.
A Superbowl win would make it immediate.