On May 31, 2019, Último Guerrero defeated Máscara Año 2000 in a "lucha de apuestas" match in the main event of the 2019 "Juicio Final" ("Final Justice") show, forcing Máscara Año 2000 to be shaved bald as a result. Following the "Juicio Final" show, Guerrero became involved in a multi-man storyline that included Bárbaro Cavernario, Big Daddy, Ciber the Main Man, Gilbert el Boricua, Negro Casas, and Volador Jr. All seven wrestlers faced off in a steel cage match as part of the CMLL 86th Anniversary Show, which saw Guerrero pin Negro Casas, forcing Casas to be shaved bald as a result. On March 26, 2021, they lost the Trios Championship against "Nueva Generación Dinamita".