In female - centered JJBA fanfic involving Killer Queen, often the character might be explored in different ways. For example, the relationship between Killer Queen and female characters could be re - imagined. Maybe it shows how a female character could interact with the power of Killer Queen in a unique setting.
One idea could be a crossover with another popular anime like Naruto. For example, Jotaro could meet Naruto and they could have a battle of wills and powers. Naruto's positive attitude might clash with Jotaro's more stoic nature.
Well, it could be about the JoJo characters getting transported into the Warframe universe. They might team up with the Tenno to fight against common enemies like the Infested. For example, Jotaro could use Star Platinum's power along with a Warframe's abilities to take on hordes of foes.
One idea could be that Kira Yoshikage from JJBA somehow ends up in the Naruto world. Maybe his Stand ability could be misinterpreted as some kind of strange ninja jutsu. He might try to live his quiet life there, but his actions would surely draw the attention of the ninja. For example, if he starts using his Stand to kill people in the ninja villages, it would be like a new and unknown threat to the ninja, and they would have to figure out how to deal with it.
The JJBA manga is indeed finished. It had a great journey and wrapped up with a satisfying conclusion for fans. However, there's always the possibility of spin-offs or related works in the future.
Well, you could focus on the character crossovers. Imagine Jotaro Kujo meeting Ichigo Kurosaki. Jotaro's cool and collected demeanor would contrast with Ichigo's more hot - headed nature. They could learn from each other's fighting styles. And then there's the possibility of Stand users having to adapt to the spiritual energy in the Bleach world and vice versa. This could lead to some really interesting power - up and training sequences for the characters involved.
After that, start writing the introduction. You can introduce the JJBA characters in their normal setting first, and then gradually introduce the elements of the other universe. This helps the reader get grounded in the story before things get really crazy. Also, don't be afraid to add your own unique twists to the story to make it stand out.