Curtis Axel and CM Punk fought, but Paul Heyman and Brock Lesnar played major parts in this drama.
In an interview with Josh Mathews, CM Punk said that SummerSlam would be "the night the beast got neutered."
He and Axel brawled on the outside before the bell rang.
Axel chopped and slapped his foe, but an enraged Punk soon took over. He mocked Curt Hennig's gum-spitting routine and threw Axel into the barricade.
Only after Axel turned things in his favor did Heyman slither back out and prowl around the ring. Axel and Punk had good chemistry, and their match had some of the best in-ring action of the night.
However, the highlight was Lesnar's appearance.
Punk attacked Lesnar with a chair, knocked him into the ring steps and had him down long enough to lunge at Heyman. Heyman told Lesnar to hurt Punk, and The Beast Incarnate obliged.
He whacked him with the chair and left Punk writhing in the ring with blood sliding down his chin.
Heyman then told Renee Young to deliver a message that "he may not make it to SummerSlam," challenging him to a one-on-one battle on next week's Raw.
After a no-contest, Lesnar and Punk brawl in a SummerSlam preview.
Punk and Axel delivered a compelling match, and Lesnar marched in for a hard-fought fight with his SummerSlam opponent.