SummerSlam 2025 ended with the shocking return of Brock Lesnar. Lesnar not only attacked Cena but also hit him with an F5 after entering the ring. This was Lesnar's second shocking WWE return since SummerSlam 2021. During the SummerSlam 2021, Lesnar had attacked the 17-time world champion after the show went off the air following his match with Roman Reigns.