Héroes Inmortales III: Homenaje a Don Antonio Peña (Spanish for "Immortal Heroes III: Tribute to Antonio Peña) was a professional wrestling major show event produced by Asistencia Asesoría y Administración (AAA) that took place on September 26, 2009 in Arena Monterrey, Monterrey, Mexico, commemorating the third anniversary of the death of AAA founder Antonio Peña. The main event of the show was a AAA Mega Championship title defense where then reigning champion Dr. Wagner, Jr. defended the championship against challenger El Mesías. The other featured match on the show was the third annual Copa Antonio Peña, a 12-man Battle Royal. The show was originally called just Homenaje a Antonio Peña but was renamed to Héroes Inmortales in the weeks leading up to the event.

On October 5, 2006 founder of the Mexican professional wrestling, company Asistencia Asesoría y Administración (AAA, or Triple A; Spanish for "Assistance, Consulting, and Administration") Antonio Peña died from a heart attack. The following year, on October 7, 2007, Peña's brother-in-law Jorge Roldan who had succeeded Peña as head of AAA held a show in honor of Peña's memory, the first ever Antonio Peña Memorial Show (Homenaje a Antonio Peña in Spanish). AAA made the tribute to Peña into a major annual event that would normally take place in October of each year, renaming the show series Héroes Inmortales (Spanish for "Immortal Heroes"), retroactively rebranding the 2007 and 2008 event as Héroes Inmortales I and Héroes Inmortales II. As part of their annual tradition AAA holds a Copa Antonio Peña ("Antonio Peña Cup") tournament with various wrestlers from AAA or other promotions competing for the trophy. The tournament is normally either a gauntlet match or a multi-man torneo cibernetico elimination match. Outside of the actual Copa Antonio Peña trophy the winner is not guaranteed any other "prizes" as a result of winning, although several Copa Antonio Peña winners did go on to challenge for the AAA Mega Championship. The 2009 show was the third show in the Héroes Inmortales series of shows.

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