Ten storylines to watch in the AFC this season. 1) Will the Chiefs reign again? Kansas City is the two-time defending AFC champion and the Vegas favorite to go to the Super Bowl again. QB Patrick Mahomes will be behind a new-look O-line, as K.C. traded for tackle Orlando Brown Jr., signed guard Joe Thuney and drafted center Creed Humphrey and tackle Trey Smith. 2) Can Urban and Trevor revive Jags?