One Piece prequel manga announces its own anime and is related to Zoro - Meristation

Eiichiro Oda confirms the anime of Monsters, the one-shot manga he wrote in 1994 about Ryuma, the samurai who fought with Zoro in Thriller Bark.

Creador de One Piece confirma estreno del 'spin-off' del anime, Luffy, Monster, manga, Eiichiro Oda

One Piece Announces 10 Big Anniversary Projects

One Piece confirma anime para su manga precuela relacionado con Zoro

Zoro and a certain Admirals connection? (Manga Spoilers) : r/OnePiece

The Will of Marco - Manga: Chapter 190 - The previous Mr. 7's invitation to Roronoa Zoro and his fate was mentioned.

The power that made Luffy the strongest One Piece character - Meristation

Roronoa Zoro Falls Into the Sea, One Piece Wiki

The power that made Luffy the strongest One Piece character - Meristation

15 Biggest Differences Between Netflix's One Piece and the Anime/Manga - What's on Netflix

One Piece Chapter 1,073: Miss Buckingham Stussy, Page 19

One Piece Prequel Anime Based on Zoro's Great Grandfather Gets Release Date