This article is about the 1994 and 1996 professional wrestling live events promoted by Extreme Championship Wrestling. For the 1994 professional wrestling pay-per-view promoted by Asistencia Asesoría y Administración, see
AAA When Worlds Collide. For the 2018 professional wrestling live event promoted by New Japan Pro-Wrestling, see
CEO×NJPW: When Worlds Collide. For the professional wrestling events staged by WWE from 2019 onwards, see
WWE Worlds Collide.
When Worlds Collide was the name of two professional wrestling live events produced by the professional wrestling promotion Eastern Championship Wrestling/Extreme Championship Wrestling (ECW) in 1994 and 1996 respectively. Both events were held in the ECW Arena in Philadelphia, Pennsylvania in the United States.