#3 Roman Reigns
The Big Dog Roman Reigns has been kept away the Championship picture ever since the former WWE Champion returned from his hiatus following his battle with leukemia.
Reigns had to forfeit the Universal Championship in order to undergo treatment and came back with renewed popularity among the fans - something he had lacked in his previous run as a babyface.
The company played it safe by not having Reigns jump into the main event scene immediately, instead, building him up as the face of SmackDown. There have been multiple backstage reports that state that Reigns is the favourite to win Royal Rumble this year and will most likely challenge The Fiend Bray Wyatt for the Universal Championship at WrestleMania 36.
While The Fiend has been portrayed as an unstoppable monster, sooner or later he would require a foe that presents a legitimate challenge and there is no one who could do that better than Roman Reigns. So, the chances of The Big Dog walking out of WrestleMania 36 as the Universal Champion are quite high.