Roman Reigns and Brock Lesnar are set for a Last Man Standing Match battle for the Undisputed WWE Universal Title when SummerSlam heads to Nashville.Roman Reigns and Brock Lesnar are set for a Last Man Standing Match battle for the Undisputed WWE Universal Title when SummerSlam heads to Nashville.Roman Reigns and Brock Lesnar are set for a Last Man Standing Match battle for the Undisputed WWE Universal Title when SummerSlam heads to Nashville.