CMLL celebrated its 91st Anniversary on September 13, 2024, with a live event at Arena Mexico, featuring a highly anticipated main event where Místico defeated Chris Jericho two falls to one. The match culminated with Místico submitting Jericho using La Mística, after a back-and-forth contest that saw Jericho initially take the lead. Following the match, Big Bill attacked Místico, but Orange Cassidy intervened to assist him. In a co-main event, Euforia lost his mask in a four-way match, revealing his identity as Jose Leobardo Moreno Leon. The event featured additional matches including a title defense by Women's Champion Willow Nightingale and the finals of the Copa Independencia Tournament. Jericho's prior intimidation tactics at a press conference added to the pre-match excitement, with speculation about a future mask versus hair match lingering post-event.