Backlash is an annual professional wrestling pay-per-view event produced by World Wrestling Entertainment, which started in 1999 and is held normally in April (with the exception of 2005). From 2004 to 2006, the event was exclusive to the Raw brand.

The 2007 event was the first PPV since Judgment Day 2003 (other than the "Big Four" PPV events) to feature all three brands (Raw, SmackDown! and ECW) after WWE stopped presenting brand-exclusive events.

Backlash often features rematches from WrestleMania, or matches based on events that took place at WrestleMania, hence the name.

Professional wrestling is a non-competitive professional sport, where matches are prearranged by the promotion's writing staff, and is also considered an athletic performing art, containing strong elements of catch wrestling, mock combat, and theatre. Each PPV event features several professional wrestling matches that involve different wrestlers from pre-existing scripted feuds and storylines. Wrestlers are portrayed as either villains or heroes in the scripted events that build tension and culminate into a wrestling match or series of matches.

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