Baron Corbin

It was difficult leaving such WWE Superstars as Bobby Roode, Dean Ambrose, and Seth Rollins off of this list. I think they have a great chance at being a future Rumble winner, but I don't think 2018 is the year for them to win the Rumble.
I put Corbin on this list because the WWE was high on him before having him win the Andre The Giant Memorial Battle Royal at WrestleMania 32. He also won the Money In The Bank Ladder Match but was unsuccessful in his cash-in attempt thanks to John Cena.
Cody Rhodes' uncle is a WWE Hall of Famer. More details HERE.
The fact that he's won a major battle royal previously is big, and so is the fact that he's had a great two-year run on the main roster since the call-up from NXT. I think it's too early for Roode, and the Ambrose/Rollins combo may still be tag champs going into mania; which leads me to put Corbin on here at number five.