#3 Big Cass
WWE split up one of their biggest merchandise selling tag teams, Enzo & Cass, simply because they believed that Big Cass had the potential to excel in a singles environment. Big Cass looks like the prototype that Vince McMahon likes: great on the microphone and is decent when the bell sounds.
Unfortunately, he suffered an injury right before his career could take off. However, Big Cass has the potential to be the next breakout star for the company. When Reigns starts losing steam, WWE may want to hand the mantle of leading WWE into the future, to Big Cass.
Of course, there would have to be a period of strong booking before he reaches such heights. In our opinion, WWE sees Big Cass as a big investment, and have plans for him, in the future.
It may be difficult to imagine right now, but Big Cass certainly has a big future in WWE.