#2 Daniel Bryan
This may seem strange, considering his status as an inactive wrestler playing the part of the general manager of SmackDown, but there are a few contributing factors that may point to Daniel Bryan being a major show-stealer at this event.
At its most basic level, Bryan has been heavily involved in the program between AJ Styles, Kevin Owens, Sami Zayn and Shane McMahon, so there's absolutely no way he doesn't make some kind of appearance in that match, for better or worse.
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There's always a chance he screws over Styles—either on purpose or accidentally—and leads to a title change, or he can step in and do the right thing to prevent the handicap gimmick from hurting The Phenomenal One.
However, what if Bryan is actually competing in the Royal Rumble on top of that?
Plenty of betting sites have his odds ranked better than a good number of other potential contenders, which is suspicious, as is how active Bryan has been in this storyline while playing up a more heel tease.
He and Styles have a camaraderie together and it's arguable that if Bryan were to be allowed to step in the ring, he'd want no better opportunity than to fight his friend for the WWE Championship at WrestleMania after winning the Royal Rumble, which is something that should have happened in 2014.
Also suspicious are the advertisements saying AJ Styles would defend the WWE Championship at Fastlane in a Fatal 5-Way against Kevin Owens, Sami Zayn, Randy Orton and Shinsuke Nakamura.
If that is true, it implies none of those men wins the Royal Rumble, leaving no other realistic contenders on SmackDown to challenge for the title at WrestleMania, as there's no chance Mojo Rawley or Epico Colon will get that shot.
If Daniel Bryan were to win the Royal Rumble, though, those four other men would take a backseat and it would make much more sense, while also fulfilling all the positives that a Nakamura vs Styles match would, along with giving fans a moment to rejoice in their fallen hero coming back from a forced in-ring retirement.
There is still much doubt that he would be cleared to compete, but if by some chance he does do just that at the Royal Rumble, he needs to jump straight to the top of the list of potential winners and Superstars who will be the star of the conversation going forward.