According to Marvel Editor-in-Chief Axel Alonso :
Ta-Nehisi has said is that he only knows the details of his first year-long story arc; he has not said he is done after that. Far from it. He’s made it clear he’d like to continue, and we are, in fact, planning our next editorial retreat, keeping his schedule conflicts in mind. I’ll let Ta-Nehisi speak to this matter himself, but ‘Black Panther’ is not a limited series; it is an ongoing series.”