#3 Dominick interferes in the match
Dominick was brought in to be part of a storyline between his father Rey Mysterio and Samoa Joe when the company was pushing them into a feud, but right now, Mysterio's medical status is unknown.
When Mysterio relinquished the Championship he did so in an honorable way and was still attacked by Samoa Joe afterward, something that Dominick must have seen from wherever he was watching the show at the time. Dominick is a trained wrestler, which means that if he wanted to he could have included himself in many of the matches between his father and Joe, but after Joe attacked Mysterio a few weeks ago he finally has a reason to go after him and if he's able to cost him the United States Championship in the process then it would give both superstars enough ammunition to build an interesting feud,
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