premise: SummerSlam had no show.
hypothesis: SummerSlam . The inaugural SummerSlam took place on August 29 , 1988 at Madison Square Garden in New York City and was broadcast via pay-per-view . SummerSlam ( 1991 ) was the fourth annual SummerSlam professional wrestling pay-per-view ( PPV ) event produced by the World Wrestling Federation ( WWF ) . SummerSlam ( 1992 ) was the fifth annual SummerSlam professional wrestling pay-per-view ( PPV ) event produced by the World Wrestling Federation ( WWF ) . SummerSlam (2011) . Six matches were scheduled for the event , with a seventh was added during the show when Alberto Del Rio cashed in his `` Money in the Bank '' briefcase and defeated CM Punk . SummerSlam (2016) . In the main event , Brock Lesnar defeated Randy Orton by technical knockout while in other marquee matches , Finn Bálor defeated Seth Rollins to become the inaugural WWE Universal Champion , Dean Ambrose defeated Dolph Ziggler to retain the WWE World Championship , and AJ Styles defeated John Cena .