#3 Aleister Black

Speaking of surprises from NXT, how about somebody who has not been advertised at all? Aleister Black is set to face Tommaso Ciampa for the NXT Championship at TakeOver Phoenix. This could very well be his NXT swansong, as he is more than ready to make the leap to the main roster.
If WWE truly wants to 'shake things up', they should consider putting Black in the Royal Rumble match. Last year saw Andrade 'Cien' Almas and Adam Cole make surprise appearances in the 30-man match, so maybe it could happen.
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The former NXT Champion has had a good run in NXT, spanning close to two years. He has had many memorable matches, against the likes of Cole, Almas, Velveteen Dream and many more. It is time for the Dutch Destroyer to unleash some of that Black Mass on Raw or SmackDown.
Black would surely make a major impact on the main roster, he and his character are too good not to. The Royal Rumble could indeed be the start of a special run for Aleister Black.