#4 Allowing Rey Mysterio's son to interfere and cost Brock Lesnar
It all began when Brock Lesnar was scheduled to take on Kofi Kingston for the premiere episode of SmackDown on FOX. He went into Beast Mode and obliterated everything that stood in his path, including Rey Mysterio and his son. It wouldn't be the only time that the younger Mysterio would be attacked by Brock Lesnar either. One can only assume that he has revenge on his mind.
And so, Rey Mysterio, when he's on the verge of losing the match after going to Suplex City could certainly use a hand from his own flesh and blood.
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It would be a great way to introduce the young man to the world and it doesn't get bigger than a WWE Championship match at one of WWE's biggest pay-per-view events of the calendar year. If he helps his dad become WWE Champion, it would be one of the best WWE moments of the decade!