I suspect moving the Super Bowl would be basically impossible. Easier scenario: Play week 18 as normal and then the NFC playoffs proceed on schedule. In the AFC, Bills and Bengals play on week 19, rest of the AFC playoff field is off. AFC playoffs then commence the following week. AFC championship is the week before the Super Bowl.
So the NFC champ gets two weeks off before the big game versus just one for the AFC champ, but the AFC champ got an extra bye week earlier (either week 19 or, in the case it's the Bengals or Bills, this week).
I remain in the just forget it and move on camp, but if they have to play the game this seems like the least disruptive model to me.