Brock Lesnar and WWE World Heavyweight Champion John Cena meet face-to-face- before their main event match-up at "SummerSlam". Also, Stephanie McMahon and The Authority continue their "ruthless aggression" campaign against Brie Bella, Roman Reigns tries to keep his momentum rolling as he gets ready for Sunday's match against Randy Orton, and Seth Rollins attempts to keep Dean Ambrose at bay.