International Wrestling Association
On August 17, 2007, Vega signed with International Wrestling Association (IWA) in Puerto Rico. Vega won his debut match and went on to defeat Ricky Cruzz and El Bacano. During an IWA and National Wrestling Alliance (NWA) inter-promotional show, Rob Conway interfered in a match between Glamour Boy Shane and Billy Kidman, prompting Vega to come out to save Shane. This marked the formation of The RS Express tag team, which consisted of Shane and Vega. The RS Express debuted against the IWA World Tag Team Champions The Naturals Chase Stevens and Andy Douglas but lost the match by disqualification after The Star Revolution Corporation and Los Aerios, two other teams contending for the tag team titles, interfered. The RS Express received a rematch on Total Impact, the IWA's television show, which ended in another disqualification after Douglas hit Vega with the championship belt. In another rematch, Douglas hit Shane with the championship belt, but the referee was distracted by Orlando Toledo, the manager of The Naturals, and so was not disqualified. This resulted in The RS Express challenging The Naturals to a hardcore street fight for the tag team championship belts; however, The Naturals prevailed again due to outside interference from Tim Arson. As a result, a four corners tag team elimination match was booked between The Naturals, The RS Express, Blitz and Chicano, and Tim Arson and Big Vito, with the winner going to Las Vegas to challenge the NWA World Tag Team Champions. The RS Express were eliminated when Arson hit Vega with a fire extinguisher, allowing Douglas to get the pin on Vega. This incident set the stage for a feud between Vega and Arson. Their first match ended in victory for Arson; however, Vega won a rematch setting up a third and final encounter. Vega ended the feud by defeating Arson.
In the middle of a feud between Germán Figueroa and Savio Vega, tensions between Savio and his cousin Ricky Vega began to rise due to Savio's erratic behavior. During a no disqualification match between Savio and Apolo, Vega attempted to stop Savio from further assaulting Apolo, as did the IWA World Heavyweight Champion, Blitz. Savio refused to listen to them and when Blitz turned to seek further assistance from Ricky, he was attacked by the latter thus forming an alliance between the Vega cousins. Both Savio and Ricky took turns assaulting Apolo and Blitz while the rest of their newly formed faction came down to ringside. Ricky's tag team partner Shane attempted to stop the beating but was attacked by the faction, referred to as "Los Autenticos." Ricky later blamed Shane for costing him the opportunity to win the tag team titles and the former teammates began a historic feud.
In their first match, Ricky defeated Shane in front of a packed crowd at Histeria Boricua. In the rematch, which was billed as a Puerto Rican Street fight, Vega again came out victorious, and earned a shot at the Undisputed World Heavyweight Championship; however, the match was not a singles match, but a five-way dance, also featuring Blitz the defending champion, Shane, Mr. Big from the World Wrestling Council and Bison Smith, who was representing Japan. The five-way dance occurred after a title unification match between Blitz (IWA World Heavyweight Champion) and Big (World Wrestling Council World Champion). Blitz defeated Big becoming the first ever Undisputed World Champion in the history of Puerto Rico. The unified title was renamed the IWA Undisputed World Heavyweight Championship.
Prior to the match, Ricky Vega began referring to himself as The Alpha Omega, claiming that the wrestling business began with and ended with him. Ricky won the match, and the Undisputed World Championship by pinning Blitz. He went on to successfully defend the title against Shane Sewell, Germán Figueroa, Ray González, Miguel Perez and Freddie "Blitz" Lozada among others.
In April 2008, an ownership dispute between Mario Savoldi and Savio Vega halted promotional events and the company stopped running shows. Savio was eventually awarded the company and its assets after court proceedings. IWA returned to television in May 2008, and a tournament was held for a new IWA Champion. The final match was between Blitz and Chicano; however, Ricky Vega returned to the IWA with the title in tow. It was reported Ricky had been on the side of Savoldi in his dispute with Savio, which was why the tournament had been set up. Despite this, Ricky was entered into the tournament final, making the match a three-way dance. Ricky was knocked out of the match by special guest referee Savio Vega, but later returned wearing a referee shirt of his own after Savio was knocked out by Blitz. Ricky counted out Chicano, making Blitz the new champion.
Ricky then aligned himself with Blitz and La Rabia and challenged Savio for his RXW World Heavyweight Championship. Ricky defeated Savio in a non-title match but lost the championship rematch after Savio hired a referee to ensure his win. After the match, Ricky was given an emotional send off by fans perhaps sensing the end was near for high level wrestling in Puerto Rico with fewer opportunities for the company to import top notch American talent. During his time with the IWA, Ricky was recognized as the Undisputed Champion of Puerto Rico, wrestler of the year and was elected as the best wrestler in Latin America during his reign.