#4 Shawn Michaels

When The Undertaker retired Shawn Michaels at WrestleMania 28, the fans broke into tears. I wouldn't be wrong to say that it was a perfect retirement match for Michaels.
However, when he returned to the ring last year, it severely damaged his legacy. Even though fans were happy to see him again in the ring, the match made Michaels' retirement meaningless. Some fans will agree that he should have stayed retired as there was no need for him to return to the ring again.
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But now that he has returned to the ring again, after many years of retirement, expect him to appear on more shows. As I said, many superstars are asking for their releases, so it wouldn't be shocking if the WWE offers tons of money to Michaels for another match. Even though he can't fight like his old days, the fans still like and want to see him wrestling.