Some major changes could be happening in the WWE, and it all begins on Sunday night in Los Angeles. SummerSlam, the second biggest Pay-Per-View of 2013, will get underway at Staples Center.

Viewers who don’t purchase the PPV on TV can watch a live stream online at for $44.99. The pre-show will begin at 7:30 p.m. ET and can be seen for free with the WWE app, YouTube or

Daniel Bryan will challenge John Cena for the WWE championship. He’s the third man to face Cena for the title, since he won the belt from The Rock at WrestleMania 29. Bryan faced CM Punk at three straight PPV’s in 2012 for the title, but was unsuccessful in all three attempts. A victory would be the first WWE championship win in his career.

Punk may no longer be in the title picture, but he is involved in one of the most high-profile feuds in the past couple of years. The longest reigning WWE champion of the past 25 years will face Brock Lesnar at the PPV. The feud began on the edition of “Monday Night Raw” following Payback, when Lesnar delivered an F5 to Punk. The match was set after Paul Heyman turned on his friend at Money in the Bank.

Those in the WWE that don’t have a match could play the biggest role at SummerSlam. Randy Orton isn’t scheduled to be on the PPV, but he holds the Money in the Bank briefcase for the WWE championship. Triple H will be the special guest referee for the WWE title match and could somehow get involved. Vince McMahon has expressed his desire for someone besides Bryan or Cena to hold the belt, so there is speculation that he could try to interfere with the main event.

Below is the entire match card for 2013 SummerSlam. Notable superstars that aren’t scheduled to wrestle include, Mark Henry, The Big Show and Kofi Kingston. Seth Rollins and Roman Reigns won’t defend their Tag Team titles, but could get involved in the match of fellow Shield member Dean Ambrose.

WWE Champion John Cena vs. Daniel Bryan (Triple H Special Guest Referee)  

CM Punk vs. Brock Lesnar

World Heavyweight Champion Alberto Del Rio vs. Christian

Kane vs. Bray Wyatt (Ring of Fire Match)

Cody Rhodes vs. Damien Sandow

Dolph Ziggler & Kaitlyn vs. Big E Langston & Divas Champion AJ Lee

Natalya vs. Brie Bella

United States Champion Dean Ambrose vs. Rob Van Dam (Kickoff Match)