Following his surprise return at SummerSlam, here are three opponents Brock Lesnar must face if he is back in WWE for the long haul.

Cody Rhodes is once again undisputed WWE champion. Rhodes outlasted John Cena in a lengthy, hard-fought SummerSlam Night 2 main event on Sunday to regain the championship he lost to Cena at WrestleMania. But it was Brock Lesnar's return to WWE after the main event that will be the main talking point for many.

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.