#2 Roman Reigns

Roman Reigns was the favorite to win the Royal Rumble match right up until late Sunday afternoon. He ended up finishing second for the 4th time in his career. The loss makes his road to WrestleMania a lot bumpier than expected. Although his likely destination is still a Universal Championship match with The Fiend.
And while it would be a great match, WWE will need to be smart in how they book this. Reigns has been getting more and more positive responses from the fans, so the company should actively try to maintain that. If that means delaying his shot at the Universal Title, so be it.
Cody Rhodes' uncle is a WWE Hall of Famer. More details HERE.
There is another opponent who could challenge Bray Wyatt at WrestleMania aside from the Big Dog but in terms of beating him, Reigns might be the best option. Whether you love him or hate him, you cannot deny his quality in the ring and as a top star.
He would have a fantastic long reign as champion after his last one was cruelly cut short. It is up to WWE whether they are ready to have The Fiend lose. There is a way to do it, as Ramblin' Rabbit alluded to a couple of weeks ago on SmackDown.
A match between Wyatt and Reigns would be their first big one after their feud in 2015, which saw the Big Dog go over.