The Undertaker
As of right now, there is no planned match for The Undertaker at WrestleMania this year, according to the Wrestling Observer Newsletter.
But that could always change as the show gets closer, of course.
Becky Lynch
There was a storyline pitched recently in WWE where Becky Lynch would fail to beat Asuka in their match at the Royal Rumble, but would enter the women’s Royal Rumble match later in the night and win, according to the Observer.
This would be a way for her to challenge Ronda Rousey at WrestleMania.
The rumored WrestleMania match is a triple threat threat between Rousey, Becky Lynch and Charlotte Flair, so Lynch and Flair are the favorites to win the Rumble match.