SummerSlam (2002)
The main event was for the WWE Undisputed Championship between The Rock and Brock Lesnar. Lesnar dominated early with some power moves. The Rock went for the Sharpshooter. Lesnar's manager Paul Heyman got involved in the match, as he was attacked by The Rock, who executed a Rock Bottom through a broadcast table on Heyman. The Rock and Brock Lesnar gave each other a "Rock Bottom". The match came to an end when Lesnar stopped a People's Elbow and a "Rock Bottom" and then executed the "F-5" on The Rock for the win and the title. Lesnar remained the youngest world champion in WWE history until Randy Orton won the World Heavyweight Championship in 2004, although Lesnar remains the youngest WWE Champion in history.
King of the Ring (2002)
Due to defeating the Intercontinental Champion Rob Van Dam in the finals of the King of the Ring tournament, Brock Lesnar feuded with Van Dam over the Intercontinental Championship. At Vengeance, Van Dam defeated Lesnar by disqualification to retain the title. After the event, Lesnar joined the "SmackDown!" brand and began feuding with the WWE Undisputed Champion The Rock as he had won the King of the Ring tournament and earned the right to challenge for the WWE Undisputed Championship at SummerSlam becoming the first winner of the King of the Ring tournament to have done so since Mabel in 1995. At SummerSlam, Lesnar defeated The Rock for the WWE Undisputed Championship. and became the youngest champion in the title's history.