He's definitely a cruiserweight that's going to reach high levels. With WWE, he's going to flourish and soon become one of the top guys there. The only question that's going to follow him while being in WWE is his character; not so much freedom there but at least he made an exciting debut at the Rumble. Almost forgot that Samoa Joe is also in WWE. He needs to move on the main roster soon.
I have been a wrestling fan since I was in the 4th grade; I was turning 9 to 10 at the time. Used to watch the old WCW (TNA) and Attitude era WWF days.
I'd like to think it'll work out okay for him. As for Samoa Joe, those two has some magic between each other in the ring as shown in the videos that I linked to you.
I'd say Stone Cold and Rock was the best part during the Attitude Era.