There really are only a couple people who could conceivably win the Royal Rumble, especially considering that the WWE World Heavyweight Championship is on the line. The most likely outcome is the champ overcoming the odds to retain. Roman Reigns has had the deck stacked against him numerous times in his brief run so far, as WWE is trying to get Reigns over as an underdog who rises to the occasion. Having him enter the Rumble first to defend his title is yet another way to hopefully rally sympathy to Roman, but will he actually win on Sunday?If you figure that Triple H is going to enter the Rumble, and Brock Lesnar is probably the other biggest name in the bout, then any one of those three could theoretically win. Maybe Hunter costs Roman the title and Lesnar wins. But the more likely two scenarios is either Roman winning or Triple H taking the title, setting up a rematch at WrestleMania. But this is a question that will determine the future plans of the main event of Mania.