ドス・カラス
Second generation wrestlers Hijo de Máscara Año 2000 and El Hijo de Dos Caras had been constant rivals follow Hijo de Dos Caras' arrival in IWRG, with both of their famous fathers, Máscara Año 2000 and Dos Caras showing up at one point. The storyline had really escalated in mid-2015 after Hijo de Dos Caras defeated Hijo de Máscara Año 2000 in a one-on-one match. A few weeks later Hijo de Máscara Año 2000 successfully defended the IWRG Rey del Ring ("King of the Ring") Championship against Hijo de Dos Caras, once again by resorting to underhanded means. On July 20, 2014 Hijo de Dos Caras won the vacant IWRG Intercontinental Heavyweight Championship. In subsequent months Hijo de Máscara Año 2000 successfully defended the Rey del Ring championship once more where Cien Caras Jr. showed up to help his cousin out. The two rivals also competed in a MXN 50,000 Ladder match on IWRG's La Isla" ("The Island") show alongside Demon Clown, Oficial AK-47, Dr. Wagner Jr., L.A. Park, Trauma I and Veneno, neither man won the match and were more focused on inflicting punishment on each other. The storyline between the two led to them both putting their championship on the line in a match, with Hijo de Dos Caras winning and thus walking away as both the IWRG Intercontinental Heavyweight Champion and the Rey del Ring Champion. Hijo de Dos Caras would remain a double champion for 98 days, until Máscara Año 2000 regained the championship on January 11, 2015 in a match where only the Rey del Ring Championship was on the line. At the 2015 "Rebelión de los Juniors" Hijo de Dos Caras outlasted a field of seven other wrestlers including Hijo de Máscara Año 2000 to become the number one contender for the IWRG Junior de Juniors Championship. At the 2015 "Festival de las Máscaras" show two weeks prior to "Guerra Revolucionario" Black Tiger, Cien Caras Jr. and Hijo de Máscara Año 2000 defeated Hijo de Dos Caras, Chicano and Dr. Wagner Jr. in the main event of the show.