SummerSlam 2015 SummerSlam 2015 was a professional wrestling pay - per - view ( PPV ) event produced by WWE . It took place on August 23 , 2015 , at Barclays Center in Brooklyn , New York . It was the twenty - eighth event under the SummerSlam chronology , and the first since 2008 to be held outside of Los Angeles as Staples Center was the exclusive home for " SummerSlam " from 2009 to 2014 . This is to be the 8th " SummerSlam " to be held in New York metropolitan area after the 1988 , 1989 , 1991 , 1997 , 1998 , 2002 , and 2007 editions . The Izod Center was originally supposed to host " SummerSlam " , but due to its closure in April 2015 , the event was moved to the Barclays Center . This was a 4 hour event . The official theme song featured for the event is " Big Summer " by CFO $ . Ten matches were contested at the event , with no pre - show . The main event was Brock Lesnar facing The Undertaker in which Undertaker won by submission when Lesnar passed out of Hell ' s Gate . Background . SummerSlam featured professional wrestling matches that involve different wrestlers from pre - existing feuds , plots , and storylines that played out on WWE ' s primary television programs . Wrestlers portrayed villains or heroes as they follow a series of events that built tension and culminated in a wrestling match or series of matches . At WrestleMania XXX in 2014 , Brock Lesnar defeated The Undertaker to break his undefeated WrestleMania streak . Four months later , Lesnar defeated John Cena at SummerSlam to win the WWE World Heavyweight Championship , but lost it the following year at WrestleMania 31 in his match against Roman Reigns when Seth Rollins cashed in his Money in the Bank contract and won the title . Lesnar received his rematch against Rollins at Battleground , and was closing in on the win when The Undertaker returned and attacked Lesnar , causing the match to end in an inconclusive finish due to Rollins and the referee disappearing from the ring . This was initially reported as a " no contest " , but the following night on the July 20 episode of " Raw " , Lilian Garcia announced Lesnar as the winner by disqualification . Also on the same night , it was announced that Undertaker would face Lesnar in the main event of SummerSlam . This will be Undertaker ' s first SummerSlam match since 2008 , and his first pay - per - view match outside of WrestleMania since Bragging Rights in 2010 . At Elimination Chamber , Ryback captured the vacant Intercontinental Championship in an Elimination Chamber match . On the June 1 episode of " Raw " , before Ryback was scheduled to defend the title against The Miz , Big Show attacked Miz and confronted Ryback . At Money in the Bank , Big Show defeated Ryback by disqualification after The Miz attacked Big Show ; therefore , Ryback still would retained the title . On the June 15 episode of " Raw " , Miz defeated Big Show by countout as Big Show was distracted confronting Ryback . On June 22 , it was announced on WWE . com ; Ryback would defend the title against Big Show and Miz in a Triple Threat match at the event . However , it was announced on WWE . com on July 15 , Ryback has sustained an injury two days prior during his match on " Raw " and would not be able to defend the Intercontinental Championship at Battleground and the match was officially postponed . On August 6th , it was announced on WWE . com that the match had been rescheduled for SummerSlam . On the May 21 episode of " SmackDown " , Bray Wyatt was defeated by Dean Ambrose , after Roman Reigns interfered in the match on Ambrose ' s behalf by executing a Superman punch on Wyatt . On the June 1 episode of " Raw " , Reigns defeated Wyatt to retain his spot in the Money in the Bank ladder match . At Money in the Bank , during the Money in the Bank ladder match , Wyatt knocked Reigns off the ladder right before Reigns could grab the briefcase . At Battleground , Bray Wyatt defeated Roman Reigns after Luke Harper interfered and attacked Reigns , reuniting The Wyatt Family in the process . On the July 20 episode of " Raw " , Dean Ambrose managed Reigns as he defeated Harper by disqualification . On the August 6 edition of " SmackDown " , Reigns challenged Wyatt to a tag team match at SummerSlam , with Reigns and Ambrose facing Wyatt and Harper , which Wyatt accepted . On the June 18 episode of " SmackDown " , Alicia Fox allied with The Bella Twins ( Brie Bella and Divas Champion Nikki Bella ) by helping Brie win her match against Paige , later naming their stable " Team Bella " . On the July 13 episode of " Raw " , Charlotte , Becky Lynch and NXT Women ' s Champion Sasha Banks made their WWE debuts ; Charlotte and Lynch allied with Paige , later naming their team " PCB " , while Banks allied with Naomi and Tamina , naming their stable " Team B . A . D . " . At Battleground , Charlotte defeated Brie and Banks in a Triple Threat match . On August 10th , it was announced that Team Bella , PCB and Team B . A . D would compete against each other in a three - team elimination match at SummerSlam . At Battleground , The Prime Time Players defeated The New Day to retain the WWE Tag Team Championship . On the July 20 episode of " Raw " , Los Matadores defeated The Prime Time Players , after a distraction by The New Day . On the July 27 episode of " Raw " , The Lucha Dragons defeated Los Matadores . On the July 30 episode of " SmackDown " , The Lucha Dragons and Los Matadores defeated The New Day and The Ascension . On the August 3 episode of " Raw " , The New Day and The Ascension defeated The Lucha Dragons and Los Matadores in a rematch . On the August 6 episode of " SmackDown " , The Prime Time Players teamed up with Mark Henry to defeat The New Day . On the August 10th episode of " Raw " , The New Day defeated Los Matadores . It was then announced on WWE . com that The Prime Time Players would defend the titles against The New Day , The Lucha Dragons and Los Matadores in a Fatal 4 - Way tag team match at SummerSlam . On the May 25 episode of " Raw " , Stardust confronted special guest Stephen Amell ( actor of " Arrow " fame ) , while losing to Neville . On the July 13 episode of " Raw " , Stardust defeated Neville . On the August 10 episode of " Raw " , where Amell was again a special guest , Neville defeated King Barrett , but was then attacked by Stardust . Stardust then assaulted Amell , who entered the ring and attacked Stardust in return . Amell and Neville then persuaded Triple H backstage to make a tag team match at SummerSlam , with Amell and Neville facing Stardust and Barrett . On the July 20 episode of " Raw " , United States Champion John Cena challenged WWE World Heavyweight Champion Seth Rollins to a WWE World Heavyweight Championship match , but Rollins refused . On the July 27 episode of " Raw " , Cena again challenged Rollins , but The Authority instead forced him to defend the United States Championship against Rollins . Cena defeated Rollins , but sustained a broken nose during the match . On the August 3 episode of " Raw " , Rollins challenged Cena to a " Winner Takes All " match at SummerSlam , for both the WWE World Heavyweight Championship and the United States Championship . On the August 11 episode of " Tough Enough " , Cena accepted Rollins ' challenge . On the June 18 episode of " SmackDown " , Kevin Owens defeated Cesaro . On the June 29 episode of " Raw " , Cesaro defeated United States Champion John Cena , but won by disqualification after being attacked by Owens , therefore not winning the title . On the July 20 episode of " Raw " , Cesaro teamed up with Cena and Randy Orton to defeat Owens , Rusev and Sheamus . On the July 23 episode of " SmackDown " , Owens attacked Cesaro after his match against Seth Rollins . On the July 27 episode of " Raw " , Cesaro attacked Owens after his match against Orton . On the July 30 episode of " SmackDown " , after Owens attacked Cesaro during his rematch against Rollins , Cesaro and Dean Ambrose defeated Owens and Rollins in a tag team match . On the August 13 episode of " SmackDown " , it was announced that Cesaro would face Owens at SummerSlam . On the August 17th episode of " Raw " , it was announced that Jon Stewart would be the Special Guest Host for the event .