Actually, Ambrose doesn't join the Authority. He turns heel but is by himself. The match with Rollins at TLC ends in no contest. Reigns comes back and separates the two. Over the weeks, he teams with both of them trying to get the stable back together. During the rumble, Reigns eliminates Ambrose, which sets Ambrose off on him and gets him eliminated. Ambroses apologise's the next night only to turn on him again, Rollins makes the save. He goes over them with a partner at the Fast Lane, with the Reigns accidental spear to Rollins and then it continues my path.