Wrestlemania XV may be memorable for the first in an excellent series of Rock vs. Austin matches. As well, it's significant because of the heel turn of Triple H and his joining of the Corporation. The notion of turning his back on Degeneration-X and aligning himself with Vince McMahon in order to procure World Championship level matches is the kind of thing that "cerebral assassins" do. Triple H losing to Kane because Chyna interfered to help Triple H made fans believe that she rejoined DX and that all was well again in the black and neon green army. However, when Triple H screwed DX member X-Pac and helped Shane McMahon retain the European Championship, both he and Chyna joined The Corporation. By the night after SummerSlam 1999, Triple H was World Champion. Target acquired.