Roman Reigns vs. Seth Rollins12 of 12Craig Ambrosio/WWE via Getty ImagesThe main event of night two of SummerSlam will see one of WWE's longest-standing rivalries add another chapter when Roman Reigns defends his world title against Seth Rollins. As Reigns has said multiple times, he needs to win this match to prove to both himself and Rollins that he is the better man. If he can't, all of his Tribal Chief posturing was for nothing. Rollins is going to give Reigns one of his best matches in quite some time, but he won't leave SummerSlam with the belt. The OTC is going to get the victory to cement himself as the top dog on Raw once again.