Need opinions.
I have owner A with a 5 point lead and Burrow. Owner B has Allen. Game cancelled, so back to team A with 5 point lead.
Both owners can play their QB's tomorrow. However, it looks like KC will win and then Buffalo has nothing to play for. They are either #2 or #3.
Is it fair for team B with Allen if he only plays part if the game? Cinn. needs to beat Balt. so Burrow should play the whole game.
Should they just be co champs?
If they want to be co-champs, I think that's pretty close and makes sense. If your software shows a slight lead, 54% to 46% win probability, you could distribute the payouts based on that percentage even though they're both co-champs. But that bit probably isn't relevant with the game that close. 50-50 Co-Champs works in this.
If that's not agreeable to them and they want a winner, then I definitely side towards replacement scores in home leagues where the camaraderie of the league takes precedent above everything else. Personally, I would make week 18 or any playoff game of their choice available to them. If they don't declare a start prior to that player's team being eliminated, then they're SOL and take their zero.
I know many will view allowing them to use any game including the playoffs as overly generous. If the goal is being fair, I think that's fair in the context that Bills-Bengals was 50 degrees plus with no wind and had the potential to be a track meet. Any playoff game they choose is unlikely to get to the implied Vegas score that they would have had in week 17. Maybe in the Super Bowl or neutral AFC Championship Game, but they will have to risk taking a zero if they push it past the first playoff game.
It's all about what makes sense to these particular owners and your league. If this is a league where everyone was unloved as small children and you're all a bunch of contract lawyers, then declaring owner A the champion is what's right for your league. Burrow and Allen take the zero.