As of September 2015, Seth Rollins and Brock Lesnar have held the WWE World Heavyweight Championship in 2015. Rollins won the title from Lesnar at WrestleMania 31 on March 29, 2015.
The scheduled main event for WrestleMania 31 was Lesnar vs. Roman Reigns. Lesnar dominated the match, but Rollins cashed in his Money in the Bank contract during the match and got the pinfall on Reigns.
Lesnar had previously defended his title against Rollins and John Cena at the 2015 Royal Rumble. After winning the title, Rollins defended it against Randy Orton at Extreme Rules. At Payback, Rollins defeated Orton, Reigns and Dean Ambrose. At Elimination Chamber, Rollins lost to Ambrose but retained the title by disqualification. At Battleground, Lesnar got a rematch, but the Undertaker caused another disqualification result. Rollins then defended his title successfully against Cena at SummerSlam.