#1. Could turn face: AJ Styles

As of now, we're not even sure if AJ Styles has officially been cleared. He is expected to be cleared by now and Tom Colohue even revealed that WWE ran a few tests on him which turned out fine.
Not only is he set to compete in the Gauntlet match at Super ShowDown, but he will also make his return to singles action this coming Monday against Aleister Black. He's expected to face The Undertaker at WrestleMania 36 and things could certainly get interesting for him.
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While the logical option would simply be to keep him as a heel, there's a possibility of an Undertaker appearance - since he's in Saudi Arabia as well. AJ Styles has always done well as a face, though there's no urgency to turn him the way there was a couple of years ago when he was the most-cheered heel on the roster along with Bray Wyatt.
Expect a possible face turn for AJ Styles at WWE Super ShowDown as we head into Elimination Chamber and then WrestleMania.