How will the AFC be re-aligned if the Jacksonville Jaguars move to L.A.?

I don't think that will happen. The NFL would want the less movement as possible. There is too much history for Kansas City and Miami to just jump divisions, especially if it is just one team that is moving. I wouldn't be surprised if the teams stay where they are. The NFL has done that before. If movement does happen, I would say it is more likely that the Jags would be put in the NFC West and St. Louis would go to the NFC South.