#1 The Undertaker
The Undertaker was responsible for the retirement of the Shawn Michaels and he is definitely the best man to face if he returns. HBK faced the Dead Man twice in a row at Wrestlemania and he lost on both occasions. But the Undertaker's streak is not alive anymore and HBK could get lucky on the third time.
The 53-year old is in the twilight of his career and he could retire soon. As a matter of fact, Undertaker teased his retirement in Wrestlemania 33 against Roman Reigns. The Phenom left his jacket, gloves and hat in the ring and the WWE Universe thought he retired after the match. Subsequently, he returned to the ring and wrestled.
However, if the Undertaker decides to retire then HBK is the perfect candidate to retire the legendary superstar. The Dead Man retired HBK eight years ago and it could be a perfect revenge for Shawn Michaels. The storyline will be certainly entertaining because they had a historic rivalry in the past.