Sting never really joined WWE. Maybe he doesn't like the environment of WWE. After all, it doesn't mean that every wrestler has to join WWE. Sting is a legendary player of WCW, and later WCW was acquired by WWE. He didn't join WWE with the acquisition of the company like most players, and TNA was formally established. Sting officially signed a contract with TNA in 2003. Until now (he has been away for a while), he is also the first hall of fame member of TNA, and now he continues to develop the plot with TNA world heavyweight champion Bobby Rudd ~
Sting's contract with TNA expired last year. He was in contact with WWE, which was the closest he had ever been to WWE. In his own words, he almost joined WWE, but finally chose to return to TNA. Maybe he is really more suitable for TNA ~