Roman Reigns and Bray Wyatt have been two of the top main event superstars on the WWE roster for several years now, so it wouldn't be a surprise if either wound up headlining WrestleMania 36.
The Big Dog and The Fiend have headlined several pay-per-view events throughout their respective careers. While Reigns is being used as one of the top faces on SmackDown Live, Wyatt is enjoying the greatest run of his career - and The Fiend is by far the most popular thing in WWE right now.
As such, these two superstars are the primary favorites to win the 2020 Royal Rumble. According to Sky Bet (h/t Ringside News), Reigns has the best odds at 9/2, followed by Wyatt at 6/1.
Finn Balor has the third best odds of winning the whole thing at 9/1, while recent WWE signing Cain Velasquez and veteran superstar Kevin Owens carry equal 12/1 odds. After those two, Drew McIntyre and Daniel Bryan share the next best odds at 14/1.
Reigns has been one of the most dominant competitors in Royal Rumble history. He was the runner-up 2014, losing to Batista. That night, Reigns had 12 eliminations, the most ever by one superstar in a single Royal Rumble.
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And of course, Reigns won the 2015 Royal Rumble, with The Rock coming out to endorse his cousin afterwards. Reigns finished third in 2016, and he finished second again in 2017 and 2018 after being eliminated by Randy Orton and Shinsuke Nakamura, respectively.
So given his main event status and long history of success at the Royal Rumble, Reigns is going to be in the running to win it all again.
Wyatt Should Be The True Favorite
Wyatt has yet to win the Royal Rumble, but you get the sense that 2020 will be his time. The Fiend is set to clash with Seth Rollins for his Universal Championship at the Crown Jewel pay-per-view on Oct. 31, and if he falls short, it shouldn't be long until Wyatt gets his shot again. WWE is intent on pushing The Fiend for a long period, so it makes perfect sense to give him his first Royal Rumble victory in three months.