Even the greatest superhero of all time needed to find his edge once. For Superman, it took dying to do it. In the 90s, a mysterious hulking being named Doomsday fell to Earth on a mission of absolute destruction. All of the DC universe squared off against it, only to be beaten down hard. Finally, in a struggle that shook the foundations of Metropolis, Superman managed to take the brute down at the cost of his own life. Thankfully, he wasn't really dead, but when he came out of his healing coma he was a new man with an awesome super-mullet. Can't get much edgier than that!