no marco is new leader of whitebeard pirates and is taking over blackbeard wants pirate king title so he don't need that title Shiryuu : I believe titles such as Yonkou and Shichibukai will cease to exist. Blackbeard will become one of the major characters developing the world of One Piece. The title of Yonkou doesn't matter to him, because he knows he can defeat anyone. What is correct, however, is that he is indeed the strongest pirate in the world at the moment since he took Whitebeard's Devil Fruit. Whitebeard was the strongest man in the world before his death (his Devil Fruit played the biggest role in his strength). After combining it with Darkness Darkness Fruit, Blackbeard has "the ultimate offense" and "the ultimate defense".