On the January 5, 2015 episode of "Raw", The Authority regained control over WWE. Rollins competed in a triple-threat match for the WWE World Heavyweight Championship against Cena and champion Brock Lesnar at the Royal Rumble later that month, which Lesnar won after pinning Rollins. At Fastlane, Rollins, Big Show and Kane defeated the team of Dolph Ziggler, Erick Rowan and Ryback; however after the match Randy Orton returned and attacked Noble, Mercury and Kane, while Rollins fled the arena. After weeks of teasing a reunion with The Authority, Orton eventually attacked Rollins, which led to a match between the two at WrestleMania 31 on March 29, which Rollins lost. Later that night, Rollins cashed in his Money in the Bank contract during Brock Lesnar and Roman Reigns' WWE World Heavyweight Championship match, turning it into a triple threat match and pinned Reigns to win the title for the first time in his career. This made Rollins the first man to cash in his Money in the Bank contract at WrestleMania and during a title match. Rollins continued his feud with Orton after WrestleMania, which led to a steel cage match for the championship with Kane residing as special guest "gatekeeper" at Extreme Rules on April 26, where Rollins retained after interference from the latter. In May, tension rose between Rollins and Kane after the latter scheduled a title defense against Orton and Reigns for Payback. When Ambrose defeated Rollins in a non-title match on the May 4 episode of "Raw", he was added to the match, therefore making it a fatal-four-way match which Rollins won after pinning Orton. Rollins then retained the championship against Ambrose on May 31 at Elimination Chamber after getting himself disqualified. Rollins again retained over Ambrose at Money in the Bank in a ladder match.