#2 Samoa Joe
If anyone in NXT is ready to be brought up to the main roster, it's Samoa Joe. In fact, it's surprising that WWE even made him put in time with the developmental system at all, given his experience and popularity.
He helped bolster the roster with some great title matches, but it's time for him to move on.
The Rumble has always been a great way for someone to debut with the main roster, and Samoa Joe is someone who is worth booking to win the whole thing. The crowd loves him, he is a heavyweight who moves like a cruiserweight and his style meshes well with anyone.
It would be surreal to see him battle AJ Styles at WrestleMania for the WWE Championship after the two were the driving force behind TNA for so long. However, seeing him face a WWE original like John Cena or Randy Orton would be equally satisfying because those matches have been on people's wishlists for years.
WWE needs to take more risks, and having Samoa Joe win the Royal Rumble would be a great way to show the WWE Universe that the company still has a few tricks up its sleeve.