Well, first, a good understanding of Jotaro's character. His stoicism, his loyalty to his friends, and his powerful Stand, Star Platinum. If the fanfiction doesn't get these right, it can feel off. Second, how the crossover world is integrated. For example, if it's a crossover with a fantasy world, how does Jotaro's more modern and gritty personality fit in? Third, the plot. It should be engaging and make sense in the context of both universes. A simple 'Jotaro shows up and saves the day' without much depth is not as good as a complex plot where he has to struggle and adapt.
One great jotaro crossover fanfiction is 'Jotaro in the World of Harry Potter'. It's really interesting to see how Jotaro's tough and stoic personality interacts with the magical world. He uses his Stand abilities in unique ways within Hogwarts, like when he has to face off against magical creatures. Another is 'Jotaro Meets the Avengers'. Here, his no - nonsense attitude clashes and also meshes with the different personalities of the Avengers. It's a wild ride as they team up to fight a common enemy that's a threat to both their universes.
In a well - written jotaro crossover fanfic, the world - building has to be on point. If it's a crossover with the Lord of the Rings world, the details of Middle - earth need to be accurate and immersive. Jotaro's Stand abilities need to be balanced in the new world. For instance, if he's in a world of magic like in the Chronicles of Narnia, his Stand can't be overpowered to the point where it breaks the story. The fanfic should also explore the cultural differences between Jotaro's world and the crossover world. For example, if he's in the Inuyasha world, how does his modern - day sensibilities clash with the feudal Japanese - like setting? The relationships Jotaro forms in the crossover world should be complex and add depth to the story.
He could meet his past allies in a different context. For instance, he might encounter Kakyoin or Polnareff when they were just starting their journey. Maybe he could also run into Dio at a time when Dio was still plotting his rise to power, which would create a very tense situation.
One popular jotaro crossover fanfic is 'Jotaro in the World of Harry Potter'. It combines the cool and stoic Jotaro with the magical world of Hogwarts, creating interesting interactions and new storylines. Another is 'Jotaro Meets the Avengers', where he teams up with superheroes to fight common enemies. There's also 'Jotaro and the Dragon Ball Universe', which imagines how he would fare in a world full of Saiyans and powerful fighters.
One common theme is romance. Writers often explore Jotaro's relationships with female characters, whether it's a slow - burn love story or a more sudden attraction. Another theme could be adventure. Since Jotaro is known for his action - packed adventures, fanfictions might include female characters joining him on his quests.
One common theme is friendship. Since Jotaro is such a complex and iconic character, many fanfictions explore how a female character can form a deep and meaningful friendship with him. Another theme is adventure. Jotaro is often involved in dangerous and exciting adventures, and in these fanfictions, the female character gets to be a part of those.
In this fanfiction, perhaps they could have an epic battle against a common enemy. Jotaro with his Star Platinum and Jonathan with his Hamon could combine their powers in a unique way.
DIO could be a likely villain. Since he has a long - standing feud with the Joestar family. He might try to take advantage of the situation where Jotaro and Jonathan meet to cause chaos and try to defeat them both.
Well, they might have an epic showdown at first. Jotaro with his Star Platinum and McCree with his Peacekeeper. But then they could realize they have a common enemy and team up. Maybe they'd exchange stories about their different worlds.