Brock Lesnars inclusion on this list is perhaps somewhat questionable, given that hes only featured in four SummerSlam PPVs (winning three and losing one). But the sheer magnitude of these matches are enough to make Lesnar a very worthy entrant on any list charting the PPVs most successful performers. His first SummerSlam, in 2002, saw him defeat the Rock to become the youngest ever WWE champion after just five months in the company. And in the following year, though he tasted defeat in a submission match as part of his epic rivalry with Kurt Angle, Lesnar still put on a stellar display, impressing with his technical and physical prowess. http://www.youtube.com/watch?v=vUy1b3v7irY Since his return in 2012 though, he's reached an entirely new level, acting as the blockbuster draw of the past two events. First against Triple H in 2012 and then against CM Punk last year, Lesnar used his unique MMA-style to put on the type of match that few others can. He has truly mastered the art of suspending disbelief, making him as entertaining as anyone in the company right now. Not many superstars can boast such a high profile and ultimately successful SummerSlam resuméand it looks like it could get even better at this years show.