#2 Finn Balor
There was a time when Finn Balor was seen as WWE's next big thing! The company even had him win the Universal Title in his second match on the main roster, which was almost unheard of. Unfortunately for Balor, a shoulder injury during that match sidelined him for a long time and he has never won the big red belt again.
Furthermore, Balor, who was an absolute megastar in NXT, went from top of the card to a mid-carder, at best. He would show flashes of brilliance every once in awhile when the time called for it, but it hasn't really been enough to raise his stock. An encounter with The Deadman could change all of that!
In the end, WWE could easily undo all of that with one simple match between The Demon King and The Deadman. Not only will it be a fitting match for The Undertaker to go out on, especially given the supernatural element, it would also be a great way for the torch to be passed to Balor.