Mysterio bested the luchador in the first title bout of the night.
The opening match of WWE x AAA Worlds Collide saw Octagón Jr., Aero Star, and Mr. Iguana pick up a win in a six-man tag.
After the bout, WWE Intercontinental Champion Dominik Mysterio, who was seated ringside alongside Liv Morgan, grabbed a microphone and began down-talking his father Rey Mysterio which led to Octagón Jr. making his way over to Dominik.
The two began brawling and after their dust-up, Mysterio proposed an Intercontinental Title match between them for the Money in the Bank Premium Live Event. It was made official and come match time, AAA Mega Champion El Hijo del Vikingo, Konnan, Psycho Clown, Mr. Iguana, and El Hijo de Dr. Wagner Jr. were all ringside for it.
Liv Morgan ended up distracting Octagón, and Mysterio capitalized to retain his title. It was Mysterio's third successful defense of the championship.
