The card consisted of nine matches, including two on the preshow, that resulted from scripted storylines, where wrestlers portrayed villains, heroes, or less distinguishable characters in scripted events that built tension and culminated in a wrestling match or series of matches, with results predetermined by WWE's writers. Storylines played out on WWE's primary television programs, Raw and SmackDown. The event featured Brock Lesnar in a match with Big Show, which was Lesnar's first match at Madison Square Garden since WrestleMania XX. Lesnar and Show previously had a feud in January 2014 after Show confronted Lesnar on the January 6 episode of Raw. There was a short physical confrontation between the two, starting a feud which was settled at the Royal Rumble 2014, where Show lost to Lesnar after being brutally assaulted with numerous steel chairs before the match began. On the July 27 episode of Raw, United States ChampionJohn Cena challenged WWE World Heavyweight ChampionshipSeth Rollins but The Authority instead scheduled a match between the two for Cena's United States Championship. Cena won the match by submission, during which Rollins legit broke Cena's nose. Rollins then challenged Cena to a Title vs. Title match at SummerSlam, which Cena accepted. Rollins won the match when guest hostJon Stewart interfered on Rollins's behalf. At Night of Champions, Cena defeated Rollins to regain the United States Championship. The following night on Raw, Cena defeated Rollins in a rematch for the title. Dolph Ziggler and Rusev had an ongoing feud, stemming from Ziggler forming a romantic relationship with Lana, Rusev's former valet. The two fought to a double countout at SummerSlam. In a rematch on the August 31 episode of Raw, Ziggler won by disqualification following the interference of Rusev's new girlfriend, Summer Rae. Ziggler defeated Rusev at Night of Champions to end their feud.
Event
Preliminary matches
The event opened with Randy Orton and Dolph Ziggler facing Sheamus and Rusev. In the end, Ziggler executed a Superkick on Sheamus, which was followed by Orton executing an RKO to win the match. Next, Neville faced Stardust. Neville executed a Red Arrow on Stardust to win the match. After that, Team Bella faced Team PCB. Nikki executed a Rack Attack on Paige to win the match for Team Bella. In the fourth match, Kevin Owens defended the Intercontinental Championship against Chris Jericho. The ending saw Jericho attempt to apply the Walls of Jericho but Owens poked Jericho's eye and pinned Jericho with a roll-up to retain the title. In the fifth match, The New Day defended the WWE Tag Team Championship against The Dudley Boyz. In the end, The Dudley Boyz performed a 3D on Kingston but Xavier Woods interfered. Accordingly, the Dudley Boyz won by disqualification but The New Day retained the title. After the match, The Dudley Boyz put Woods through a table with a 3D. In the sixth match, Brock Lesnar faced Big Show. During the match, Big Show executed three Chokeslams on Lesnar for a near-fall. The match ended when Lesnar executed four German Suplexes and an F5 on Big Show to win the match.
Main event
In the main event, John Cena defended the United States Championship against WWE World Heavyweight Champion Seth Rollins in a Steel cage match. In the climax, Cena attempted an Attitude Adjustment but Rollins countered the move and attacked Cena with a low blow. Rollins attempted to climb out of the cage but Kane appeared and forced Rollins to climb back in. Rollins then attempted a Frog Splash off the top of the cage but Cena moved out of the way and executed an Attitude Adjustment to retain the title. After the match, Kane performed a Chokeslam and a Tombstone Piledriver on Rollins.