The 2007 SummerSlam was the 20th annual SummerSlam professional wrestling pay-per-view (PPV) event produced by World Wrestling Entertainment (WWE). It was held for wrestlers from the promotion's Raw, SmackDown!, and ECW brand divisions. The event took place on August 26, 2007, at the Continental Airlines Arena in East Rutherford, New Jersey. Tickets for SummerSlam went on sale on December 30, 2006, and sold out in 40 minutes.

The main feud, a staged rivalry between wrestlers, heading into the event from the Raw brand was between John Cena and Randy Orton. On the July 23 episode of Raw, Jonathan Coachman announced Orton as the number one contender to the WWE Championship. Over the proceeding weeks, Orton provoked Cena by interfering and attacking him during his matches. From SmackDown!, the predominant feud was between The Great Khali and Batista. After Khali defeated Batista and Kane in a Triple Threat match, Theodore Long booked Khali to defend the World Heavyweight Championship against Batista at SummerSlam. The primary feud from ECW was between John Morrison and CM Punk. By defeating Morrison in a 15 Minutes of Fame match, Punk became the number one contender to the ECW Championship at SummerSlam.

Several of the existing feuds carried on after the event. Notably, CM Punk continued to face John Morrison, defeating him for the ECW Championship the following month on ECW on Sci Fi. The day after SummerSlam, Orton, as part of the scripted events, interfered in a match between Cena and King Booker and intensified the feud by attacking Cena's father. Khali and Batista faced each other at Unforgiven, the following pay-per-view, as part of a triple threat match; Batista was victorious in this match and won the World Heavyweight Championship. This event marks the in-ring returns of Rey Mysterio and Triple H, who had been out due to injury since October 2006 and January 2007 respectively.