ECW was a brand of the American professional wrestling promotion World Wrestling Entertainment (WWE) that was established in May 2006 and discontinued in February 2010. Brands are divisions of WWE's roster where wrestlers are assigned to perform on a weekly basis when a brand extension is in effect. Wrestlers that were assigned to ECW primarily appeared on the brand's weekly television program, ECW. The brand was established as a relaunch of the former Extreme Championship Wrestling (ECW) promotion, the assets of which WWE acquired in 2003.

The 2005 ECW One Night Stand was the inaugural One Night Stand professional wrestling pay-per-view (PPV) event produced by World Wrestling Entertainment (WWE). It took place on June 12, 2005, at the Hammerstein Ballroom in the Manhattan borough of New York City, New York. Although wrestlers from WWE's Raw and SmackDown! brands appeared on the show, the event was primarily produced as a reunion show for wrestlers from the former Extreme Championship Wrestling (ECW) promotion, which had folded in 2001. After the promotion's closure, WWE acquired ECW's assets in 2003.