#1. Dominik Mysterio
Dominik Mysterio is the latest addition to this list. The son of current WWE star Rey Mysterio only signed a WWE contract back in August.
At present, Dominik is embroiled in a feud with former World Champion Seth Rollins. However, over the past year, he has been part of several storylines alongside his father, which have allowed him to work alongside the likes of Brock Lesnar and Samoa Joe.
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This isn't the first time that Mysterio has performed in front of the WWE cameras. Dominik was a part of the feud with his father and Eddie Guerrero back in 2005 when there was a battle for the custody of the then eight-year-old. Mysterio won their ladder match at SummerSlam that year, which allowed Dominik to return home with his father.
In recent years, Dominik has trained under the watchful eye of his father as well as Lance Storm. He is now a legitimate member of WWE's main roster, having skipped NXT and developmental. Dominik has already been presented as a massive star, with his debut against Seth Rollins at SummerSlam being praised fans, critics, and even by WWE Chairman Vince McMahon.