#2 Brock Lesnar
With Brock Lesnar currently on RAW and carrying the WWE Championship, it seems unlikely that he will be crossing paths anytime soon with the Fiend, who's on SmackDown.
However, if the WWE decides to book them in a feud, the fans couldn't guess who would come out on top.
Brock Lesnar has been bested by the likes of Goldberg, Roman Reigns and Seth Rollins in recent history but every time, the Beast has gotten his own and then some back.
Lesnar is WWE's version of the immovable object in the sense that he has lodged himself into the Title picture and has been nigh un-removable since 2017.
His weasel-like advocate Paul Heyman dishes out spoilers while Lesnar runs roughshod over whoever steps up to him.
That script changes against the Fiend. Paul Heyman's barbed comments will not affect the ethereal creature while Lesnar's superhuman strength is likely to be equalled in the ring.
This match-up oozes intrigue.