In recent years, the venerable JoJo's Bizarre Adventure franchise has become one of the most popular shonen/seinen properties among anime and manga fans. This is due to its unique mix of familiar and influential shonen manga elements with wildly unique concepts, and it's helped by the fact that the multigenerational story reinvents itself with each arc. Now, many fans are wondering if the latest new form of the manga might be its last.
Source:https://www.cbr.com/jjba-part-9-ending-theory/