@fota1885 One piece is an anime that doesn't really fit the theme of Sea of Thieves. Pirates of the Caribbean has influenced the game for years which is probably one of the reasons for their partnership. A tall tale would integrate one piece into the lore of the game, which I highly doubt rare would ever do.
It's been asked on the forums many times and from the arguments you can see that one party loves it and the other truly despises it. I haven't watched it so I can't really give my opinion on the show, but I do think crossovers should be kept to a minimum.
Rare would also have to get a partnership with One Piece because of copyright.