Samoa Joe reportedly has a very unique contract in terms of him being allowed to wrestle on the independent scene for a while until his contract limits him to WWE activities only. Triple H is believed to have made the call to allow him to keep using the Samoa Joe name.
The T-Shirt which he wore to the ring during his debut at NXT Takeover: Unstoppable has sold out until 6/15.
PWInsider is reporting Samoa Joe will be featured prominently on the next four weeks of NXT which were filmed yesterday.
Source: PWInsider.com