https://twitter.com/jojo_wiki/status...90161487368198
not much is known so far other than its involving Jousuke from Part 4 and Hol Horse who Araki wrote out of Stardust Crusaders after he wanted him to join the good guys and decided against killing him off before Dio. His last chapter was released in 1991 so this character has no been in printed media in 30 real world years. What he is doing in Morioh with Jousuke nobody knows. All we apparently know from interviews that could be mistranslated is its by the team who works on Rohans spin offs and is set after the end of Yoshikage kira.
With Part 9: Jojolands a ways away this should be an interesting gap filler to revisit the early 2000's era of part 4. Shame its gotten very little buzz in the west considering how big jojo as a whole has gotten.