4. Naomi
While it is a long shot that Naomi will win the Royal Rumble, given that they just presented this match on SmackDown, it's clear that they are building a long-term story between Naomi and authority figure Sonya Deville.
Could Deville be the hurdle that Naomi has to overcome to finally get a fair shot at Charlotte's title? Will Deville have Naomi be the first entrant to tell the story of Naomi running the table to win the Royal Rumble and earn the title shot?
Again, this is a long shot... but as Naomi is being primed for something higher than the average mid-card feud, the WrestleMania showdown with Charlotte shouldn't be out of the question.
3. 2021 Royal Rumble Winner, Bianca Belair
The creative team is clearly still high on Bianca Belair, given that she's in the mix to challenge for the Raw Women's Championship at the Royal Rumble. She's also had several good matches with Flair, which would warrant a showdown on the big stage.
It remains to be seen if Bianca will face Becky Lynch for the Raw Women's Championship at the Royal Rumble, but even if she were to be in the match and lose, she still has enough credibility to enter the Rumble match, win and go on to face Flair at WrestleMania. It would be very probable to see her eliminate the field and stand tall that evening.