6 Amazing Rivalries That Could Have Happened But Did Not 

#1 Eddie Guerrero/Shawn Michaels:

Shawn Michaels and Rey Mysterio paying tribute to Eddie Guerrero.

Shawn Michaels' career-threatening injury in 1998 caused him to miss several important story-lines. He could have been a major part of the Attitude era. He could have feuded with and wrestled some of the best Superstars of that time, whom he couldn't face after his return due to the brand split or other reasons. At Wrestlemania 22, Shawn Michaels was supposed to face one such Superstar.

Court Bauer revealed that Bruce Prichard pitched a dream match for Wrestlemania 22 to Vince McMahon between Shawn Michaels and Eddie Guerrero. The idea was discussed a day or two before Eddie's death. According to Bauer, Vince was really impressed with this idea. Prichard also suggested doing parallels of their careers and Vince was impressed by this idea too and asked for footage of Eddie Guerrero they had outside of WCW.

The feud would have been one of a kind and the match would have overshadowed any other match that followed it. Eddie's tragic death caused those plans to be changed and Michaels ended up facing Vince McMahon at the Show of Shows.