Worlds Collide is a professional wrestling event series co-produced by WWE, an American-based professional wrestling promotion, and Lucha Libre AAA Worldwide (AAA), a Mexican-based subsidiary of WWE. The event was first established as When Worlds Collide in 1994 as a co-production of AAA and World Championship Wrestling (WCW). WWE purchased WCW in 2001, acquiring the rights to When Worlds Collide. WWE re-established the event in 2019 as Worlds Collide, with the concept being interbrand competition between WWE's various brand divisions. Although the event has been held primarily for WWE's developmental brand, NXT, other brands have also been featured. The event was put on hiatus after the 2020 event but returned in 2022. After another three-year hiatus, the event returned in June 2025 and was held with Mexico's AAA, which WWE acquired in April 2025.