Triplemanía XX was a professional wrestling event scripted and produced by the AAA promotion, which took place on August 5, 2012, at Arena Ciudad de México in Mexico City, Mexico. The event was the twentieth annual Triplemanía, which is AAA's biggest show of the year, and marked AAA's debut in the new Arena Ciudad de México. The event was headlined by a match between Dr. Wagner Jr. and Máscara Año 2000 Jr., where the loser was forced to unmask himself. In the semi-main event, El Mesías defended the AAA Mega Championship against the 2012 Rey de Reyes, El Hijo del Perro Aguayo. The event also featured Total Nonstop Action Wrestling (TNA) performer Kurt Angle's AAA debut and an induction into the AAA Hall of Fame. This event marked the first time in four years that a Triplemanía was not broadcast live on pay-per-view. Instead, the event would be broadcast in three parts on AAA's official website, starting August 19. The event was attended by 21,000 people, the largest crowd for a professional wrestling event in Mexico in almost five years.

Mexico City Arena is an indoor arena in Azcapotzalco, Mexico City, Mexico. It hosts concerts, sports, and other events. It officially opened on February 25, 2012. The total cost of the arena was $300 million. The arena has a maximum capacity of 22,300 spectators. It is operated by Zignia Live. It is located in Avenida de las Granjas, close to Ferrería metro station, Fortuna railway station of the Suburban Railway, and next to TecMilenio University.