#1. Won't get pushed: Johnny Gargano

This may upset some people, but it's a sad reality. Johnny Gargano is by far one of the best in-ring performers in the world today, and there's a reason he's called Johnny Wrestling. However, his rise in NXT was thanks to the environment and great creative that the yellow brand has.
As we know, creative and booking are miles apart on the main roster, and Gargano is more likely than not to suffer from bad booking. His character arc in NXT happened over the course of 2 and a half years, something which WWE's main roster doesn't consistently have.
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He's been compared to Daniel Bryan before, but he may have a similar fate to Sami Zayn. Hopefully, we're wrong, but it's more likely that Gargano gets toned down a lot on the main roster. This includes the length and quality of his matches decreasing two-fold.