#2. Former 14-time WWE World Champion Randy Orton
Randy Orton and Edge were once WWE World Tag Team Champions. It was thought that Rated-RKO was going to get back together when Orton offered his hand to Edge following the latter's Royal Rumble return last year.
Orton and Edge then had a lengthy feud and Edge suffered a torn tricep at WWE Backlash last year. Even though Randy Orton has since moved on to a feud against The Fiend, The Viper will still be in the Royal Rumble match and it's hard to imagine that these two men won't have some kind of altercation if they are in the match at the same time.
Orton already put Edge out of action for seven months and he will definitely feel the need to brag about this if the two men come face-to-face.
The Viper obviously has his hands full with Alexa Bliss and The Fiend right now, but he could make time to tease that the feud with Edge is far from over before being eliminated from The Royal Rumble match.