TheGodling
Los Ingobernables de Sala de Cine
He probably chose to go to NXT and stay for a little bit. He's a big enough name where he could have immediately made the leap to the main roster like AJ Styles.
I think it just happened because at that time it was pretty much the go-to method for any wrestler coming from another promotion regardless of the length of their careers. You go through NXT before getting called up. The thing is that Joe pretty much exposed how pointless that is, and further emphasized by how almost dead on arrival guys like Austin Aries are in NXT while AJ Styles showed that a direct transition to the main roster can easily work.