In a storyline described by "Rolling Stone" as "the wildly unpopular MexAmerica storyline", Colter returned at Hell in a Cell 2015, utilizing a mobility scooter, where he announced that the returning Alberto Del Rio would answer John Cena's Open Challenge for Cena's United States Championship, where Del Rio was victorious. The next night on "Raw", Del Rio and Colter began advertising a union between the United States and Mexico as "MexAmerica", leading to several confrontations with Colter's former protege, Jack Swagger. After Colter caused Del Rio to stumble during one of these confrontations on the December 7 episode of "Raw", Del Rio ended his association with Colter. This marked his last appearance in WWE, as he was released from his WWE contract on May 6, 2016.