However, due to technical difficulties Ustream was unable to air the event, leading to the company offering refunds to all those who had purchased it through its site.

The Triplemanía XXI show featured eight professional wrestling matches with different wrestlers involved in pre-existing scripted feuds, plots and storylines.

On October 7, 2012 the makeshift team of Vampiro and Joe Líder defeated La Legión Extranjera (Abyss and Chessman) in a Tables, Ladders, and Chairs match to win the AAA World Tag Team Championship as part of AAA's 2012 Héroes Inmortales ("Immortal Heroes") show.

[17] Mexican mixed martial arts (MMA) fighter Érik "Goyito" Pérez was originally scheduled to accompany Octagón for the seventh match against the Lucha Libre Leyendas team, but was forced to withdraw from the show due to an injury.

[19] During the Triplemanía XXI AAA played videos to pay homage to Abismo Negro who was that year's hall of fame inductee.

While Triplemanía XXI was supposed to be the first iPPV held by AAA in collaboration with Ustream, but the show never aired live on the Internet.

[22] AAA later offered a full refund to anyone that bought the PPV and made the entire Triplemanía XXI show available in HD on their official YouTube channel.

Over the fall on 2013 the storyline began to focus on a feud between Texano Jr. and Psycho Clown, leading to a successful Mega Championship defense at Héroes Inmortales VII on October 18, 2013.

[29] At the subsequent Rey de Reyes show Psycho Clown, Cibernético and Electroshock defeated a La Sociedad team of Texano Jr., Jeff Jarrett and Máscara Año 2000 Jr.[30] The victory led to Psycho Clown getting another match for the AAA Mega Championship at the Verano de Escándalo show a few months later.

[32] Los Mexican Powers would end up holding the AAA World Tag Team Championship for 124 days and had a successful title defense against Daga and Psicosis in August 2013.