Samoa Joe made his debut at the end of NXT TakeOver: Unstoppable. He came out at the end of the Sami Zayn vs. Kevin Owens match. Owens was brutalizing Zayn and the referees and trainers came out to stop Owens from attacking him.
The match was pretty much called off at this point and music played. That’s when Samoa Joe came out and stood face to face in the ring with Owens. Owens backed off and walked back up the ramp. He teased getting back in the ring but thought better of it. The show ended with Zayn being checked on in the ring by doctors and trainers and Joe standing in the middle of the ring. My assumption is that Zayn will be taking time off and this angle was his storyline exit for the time being.
Obviously this is leading to an Owens vs. Joe feud.