When WWE Raw comes to Mexico City next month, Roman Reigns will be defending his World Heavyweight Championship. To determine that challenger, WWE is holding a tournament featuring the best luchadores from Raw, SmackDown, and AAA. “And that’s why he has agreed to defend the World Heavyweight Championship that night on Raw. WWE’s trip to Mexico City —Starting on September 9, WWE has split tours in South America and Mexico. A Worlds Collide event with talent from WWE, AAA, and NXT will then take place in Chicago on September 26.