According to PWTorch, that Samoa Joe now has signed a full time deal, he will be finishing up is current independent dates. The reason why was to do with merchandise sales, the figures were impressive enough to the point that his merch is sold out. Triple H and Vince pushed to sign him full time.
PWInsider is also reporting that his previous contract had a clause allowing the WWE to sign Samoa Joe to a full time contract. With ROH now on a national television network, they close to exercise that clause.