5 potential feuds for Rey Mysterio in WWE

#1 Finn Balor

Finn Balor was the "Iron Man" in the 2018 Royal Rumble match

Bálor is a one-time NXT Champion, with his reign being the longest in the title's history with 293 days. He is also the quickest wrestler in WWE history to win a world title at 27 days following his main roster debut by becoming the inaugural Universal Champion at SummerSlam 2016.

It is worth noting that Finn Balor denied Rey Mysterio the chance of challenging for the Universal Title at WrestleMania when he eliminated him in the Royal Rumble, after just over 9 minutes. Balor went on to claim the title of "Iron-man" since he lasted for over 57 minutes and tossed over 4 men in the Royal Rumble match.

Perhaps Rey could feud with Balor in his quest for redemption, for being denied the chance to once again be in the main event at WrestleMania. A feud with Finn Balor would be a once-in-a-lifetime collision between two of the most accomplished wrestlers in history.