#5 Lars Sullivan

If WWE are indeed interested in pushing Lars Sullivan as a monstrous heel on the main roster, then there's no better platform for him to showcase his domination than the Royal Rumble.
Despite the fact that there are many speculations that surround this gigantic force's future with the company, Vince McMahon's adulation for physically strong characters could coerce him into a headlining act at the Show of Shows.
His intimidating presence could also be fulfilling in presenting NXT in the right way, where professional wrestlers are efficiently moulded to become a top gun on the main roster.
While many would consider this to be a risky pick, I genuinely believe that Sullivan could be a force to reckon with on the main roster and presenting him as a threat in the Royal Rumble match could put him in the Final Four.
#6 Charlotte Flair

Another female WWE superstar who is currently locked in to be in a major program at the Grandest Stage of Them All is none other than Charlotte Flair.
Charlotte's gifted abilities make her a genuine contender to win the Women's Royal Rumble match this year with many expecting her to be in a final tussle with Becky Lynch to close this match.
While Vince McMahon certainly wants the Queen to be a part of the main event of WrestleMania 35, I genuinely feel that she could be the one stealing the show this Sunday at the Royal Rumble.
Expecting her to find a way through this one, with both Charlotte and Becky Lynch putting all on the line to grab the golden ticket to the MetLife Stadium in New Jersey.