The Undertaker's twilight has been an interesting one, mainly because of Brock Lesnar.
It was Lesnar's victory at WrestleMania XXX that changed Undertaker's streak from a sure thing that fans took for granted to a dark cloud that follows him into the ring. In the previously unfathomable post-Streak era, every time Undertaker competes, there's a legitimate question as to whether we're seeing him for the last time.