Stewart began a feud with WWE superstar Seth Rollins in March 2015, and appeared on WWE Raw during a segment hosted by Rollins. On August 23, 2015, Stewart returned to host the WWE's SummerSlam in Brooklyn, New York. Later, he got involved in the main event between Rollins and John Cena, helping Rollins retain his WWE World Heavyweight Championship, as well as winning Cena's United States Championship when he interfered and hit Cena with a steel chair. The next night on Raw, he explained his actions, saying he did it for Ric Flair (who was also present), which was to retain his world championship record. Cena then gave Stewart his finishing move, the Attitude Adjustment, to end the segment. Stewart returned at SummerSlam on August 21, 2016, as a special guest.