#4 Daniel Bryan and Shawn Michaels
What's worth noting, in this case, is that Shawn Michaels was the mentor of Daniel Bryan when he was still trying to make his mark on the industry. A segment from early 2014 saw John Cena and Randy Orton fight it out in the ring, with a string of champions surrounding them. This led to Bryan putting Michaels down, and this was all we got!
Also read: Bray Wyatt and JoJo react to his return
Bryan is donning a completely different persona at the moment. He is a delusional heel who wants to save the planet. A teacher vs student segment would be money here, with Bryan going off on Michaels, talking about how he would have made it even if Michaels wasn't there to train him.
Now that Michaels' retirement has been ruined, there's a slight chance we just might get this dream match in the near future. The reunion episode could be utilized to kick off a short-lived feud between these two.