According to the first anticipations of the magazines dedicated to Japanese television, we learn that there will be a double episode for the animated series of One Piece.
The double episode should air on January 6, 2019. It should transpose chapters 892 and 893 of the original manga.
So the anime will be getting a double episode much like the Sanji vs Luffy fight except this time there’s no flashbacks dedicated to one of them.
This double episode, considering the chapters to adapt, might well be devoted in large part to the showdown between Luffy and Katakuri.