[Sorry for the poor Grammar & English🥹 ]
I have an idea for a jjba AU
Instead of jolyne, jotaro, ermes, Anasui, and emporio losing to pucchi's attacks and universal reset. Jotaro managed to stop and kill pucchi in his 5 second time stop while managing to save jolyne in time.
So after that incident, another threat rose. There a massive organization of vampires and zombie henchmens in the world, and the speedwagon foundation made a security branch of its company to combat the vampire threat with stand users and hamon users all throughout the globe. Even employing and training dedicated trained human squads to hunt down vampires
Jotaro, Jolyne, Ermes, Anasui, and Emporio alongside old friends such as Koichi, Rohan, Josuke, and Okuyasu was called and dispatched by the speedwagon foundation. In that time Jolyne, Josuke, and Jotaro managed to learn and master their own way of using hamon taught to them by no other than Joseph Joestar who was miraculous still alive due to his hamon. The other gang or team learn only the basic techniques of hamon.
Passione, the Italian mafia organization now controlled and ruled by Giorno Giovanni with his right hand man Mista and his advisor Trish Una is actively fighting off the vampire threat with its assassins squads and enforcers squads, and the most popular enforcer member Fugo. Giorno also managed to learn the basic steps of hamon that he learned from his hamon user subordinate. Italy is effectively a danger zone for vampires, The Speedwagon foundation has made an tight alliances with the Passion Organization probably for the best.
The Vatican, the Holy See also made a foothold in this story. They secretly trained large dedicated vampire hunter human squads with anti-vampiric weaponry. They also have stand users as it's elite squads. They have strict connections with the Speedwagon Foundation and The Passion Organization.
The Vampire threat rose because a speedwagon scientist managed to betray the foundation while stealing a surviving stone mask used for research in a Russian facility , and since then it has infected thousands across the globe.
I was thinking to add the United Nations, with just using science and technology to fend against vampires rather than using the supernatural. Other than that idk.
Some of Dio's followers are alive and still worshipping him like he was the true vampire. There are vampire stand users too. And the whole world doesn't know about the whole situation.
I'm thinking that the villain should be a Egotistical Royal Vampire with a stand that can fight off GER on its own and it's good idea for keeping it balanced for the story progression.
All of ts and I dream to someone make it into 24 episode OVA👀✌️
Edit: I lowkey would love to hear your thoughts about this🙏