When Brock Lesnar returned to WWE in 2012, he immediately entered into a feud with John Cena, setting up a dream match. The two had clashed once before - at Backlash 2003 - but that was before Lesnar became UFC Heavyweight Champion and Cena became WWE's franchise player. The resulting bout was excellent, not only for the action, but for delivering a battle fans never thought they'd see when each man was dominating his own realm. Lesnar then entered into a feud with Triple H - whom he had never wrestled in his original run with WWE - defeated CM Punk, and delivered a classic with Cena and Seth Rollins. Oh, and he ended The Undertaker's WrestleMania streak. The past three and a half years have been very interesting (at least when "The Beast" is around), and his contract guarantees that he'll be a part of WWE through WrestleMania XXXIV. Currently, Lesnar is scheduled to take on The Undertaker in a rubber match at Hell in a Cell, hopefully ending their feud so both men can move onto new programs. After all, there are still so many Brock Lesnar dream matches that we have yet to see...