Roman Reigns and Brock Lesnar had been one of the best supestar in WWE universe.Brock Lesnar had been defending his title against various supestars such Braun Strowman,Samoa Joe and much more.However he never defeated Roman Reigns in a match.Although they had a match in Wrestlemania 31,but it was interrupted by Seth Rollins when he cashes in his money in the bank.Wrestlemania 34 is more like a rematch for Brock Lesnar and Roman Reign and I think Roman Reign will beat Brock Lesnar.Well he almost beated brock in Wrestlemania 31.