WWE SummerSlam 2015 is already filled with star power with Brock Lesnar and The Undertaker headlining the event. John Cena and Seth Rollins will also face each other in a title vs. title match.

"Arrow" star Stephen Amell will make his in-ring debut in a tag team match with Neville against social media rival Stardust and King Barrett. If that is not enough, SummerSlam just got more star-studded.

In a report by USA Today, Jon Stewart will be hosting SummerSlam 2015. This is Stewart's first major appearance since leaving "The Daily Show" last August 6.

The former host of "The Daily Show" is a lifelong WWE fan and has guest hosted "Monday Night Raw." He also had a feud with WWE Heavyweight Champion, Seth Rollins.

The main event of the show features the revenge match for The Undertaker. WWE's Phenom lost his undefeated Wrestlemania streak against Brock Lesnar in 2014. Paul Heyman has built up the hype with his incredible promos.

Seth Rollins is facing his toughest challenge in his WWE title reign in the form of U.S. Champion John Cena. Rollins was defeated by Cena during the U.S. Title Invitational after suffering broken nose from a knee-to-face hit by the WWE champion.

According to Rajah.com, three WWE legends are scheduled to make appearances for the SummerSlam weekend. "Stone Cold" Steve Austin will be co-hosting the WWE2K16 event, and Kevin Nash is expected to be there for fan signings. Scott Hall, on the other hand, appears to be attending the NXT TakeOver: Brooklyn event. The NXT TakeOver: Brooklyn will be headlined by Finn Balor vs Kevin Owens for the NXT title, per WWE.

Here are the matches announced for WWE SummerSlam 2015 via WWE:

  • Brock Lesnar vs The Undertaker
  • Randy Orton vs Sheamus
  • U.S. Champion John Cena vs WWE World Heavyweight Champion Seth Rollins in a Winner Takes All Match
  • Intercontinental Champion Ryback vs The Big Show vs The Miz in a Triple Threat Match
  • Bray Wyatt and Luke Harper vs Dean Ambrose and Roman Reigns
  • WWE Tag Team Champions The Prime Time Players vs Los Matadores vs The Lucha Dragons vs The New Day in a Fatal 4-Way Match
  • 'Arrow' Stephen Amell and Neville vs Stardust and King Barrett
  • Kevin Owens vs Cesaro
  • Team Bella vs Team B.A.D. vs PCB in a Three Team Elimination Match

Also, in a report from RSN, Dolph Ziggler has challenged Rusev in a match at SummerSlam. WWE SummerSlam is a four-hour event to be held at Barclays Center in Brooklyn, New York on August 23, 2015.