This year's 33rd issue of Shueisha's Weekly Shonen Jump magazine revealed on Saturday that artist Boichi (Dr. Stone, Origin, Sun-Ken Rock) will draw a one-chapter official spinoff manga for Eiichiro Oda's One Piece manga. The one-shot is titled "Roronoa Zoro: Umi ni Chiru" (Fall Into the Ocean), and the manga will focus on a fight between Zoro and Mihawk.
Shueisha will publish the manga in the magazine's 34th issue on July 22. The chapter will have 46 pages and will also feature a center color page. The one-shot is celebrating the manga's 22nd anniversary, which will also be on July 22.
The magazine also teased that the 34th issue will feature the "latest information" about the live-action Hollywood television series adaptation of the manga, as well as other projects for the manga's 22nd anniversary. The live-action adaptation was announced on the manga's 20th anniversary in July 2017.
<!–Tomorrow Studios, a partnership between producer Marty Adelstein (Prison Break, Teen Wolf) and ITV Studios, will produce the adaptation. Adelstein commented on the project in July 2017, stating “I am enthusiastic to give my all to make One Piece succeed. I think this project could set a new record for the highest production cost in television drama history. The work’s worldwide fame merits this scale of production.”
Oda himself commented in July 2017 that his condition for the project was that the project “will never betray the fans who have supported me for 20 years.”–>
Oda began serializing the manga in Weekly Shonen Jump on July 19, 1997 (although the issue was dated with July 22), and Shueisha published the manga's 93rd volume on July 4.
Source: Weekly Shonen Jump issue 33