I would think wait and see if that game is rescheduled. There are so many thoughts/theories floating around, no one knows what's going to happen. If it is not resumed, you could split the third-place money, or, take the respective players' points from their Wk 18 games (at least that way, it's decided on the field). Might have to be done manually. My 2 cents.
My brother asked me what he should do. My opinion is that it's the luck of the draw, no different than when your guy gets hurt in the first qtr. Sucks, is a bad beat, blah, blah, blah, but them's the breaks, you lose.