Brock Lesnar’s surprise comeback at SummerSlam stunned WWE fans and disrupted John Cena’s emotional farewell tour. The return sets the stage for a final clash between two of wrestling’s biggest stars.

Brock Lesnar surprised and delighted fans at WWE SummerSlam Aug. 3 as he returned to the ring to face his wrestling foe, John Cena. Here's how the WWE kept his appearance a huge surprise.

Cody Rhodes was able to defeat John Cena for the Undisputed Championship in the main event of WWE's "SummerSlam." The two-day event took place over the weekend.