Surprise Packages
There have been rumors of a big singles' push for Big E over the last three years, but WWE is reluctant to break up the New Day.
Of the three, he's the total package who could easily be world champion under the right circumstances. Have him turn on his brothers or just have it be a straight face vs. face match. It's worked before (Cena vs. Bryan).
There's also the fact that constantly being in the tag title feud has held Big E's singles' push back. He has untapped potential as a top player. He can handle it on the microphone and is a beast in the ring who can hang with anyone.
Although he's already feuded over the WWE Championship with AJ Styles, Samoa Joe as champion is something the WWE should seriously consider.
He can battle with AJ Styles again. Or he can have a series of great matches with Daniel Bryan. Either option is appealing. Joe hasn't tasted gold yet on the main roster, but having him hold court over Smackdown would totally change the show's dynamic.