Well, a plot idea could be that in a parallel world, Zoro and Mihawk are from the same village. They grow up together and compete from a young age. As they get older, their rivalry turns into a mutual admiration. Then an ancient evil related to the origin of their swordsmanship emerges. They must put aside their differences and work together, using their combined knowledge and skills to defeat this new threat. This would explore their relationship in a whole new context, with a shared history.
A plot could involve Mihawk taking Zoro as an apprentice for a short period. Zoro struggles with Mihawk's strict and different training methods compared to what he's used to. As time passes, they develop an unexpected bond, not just as teacher and student, but as comrades who respect each other's dedication to the sword. Maybe there could be a tournament where they both participate, and their relationship is tested as they face off against other strong opponents.
One idea could be Zoro seeking extra training from Mihawk in a secluded place. During this time, they start to understand each other's pasts and the reasons behind their swordsmanship. Another could be a scenario where they have to team up against a common enemy that threatens the world of swordsmen. This would force them to combine their skills and learn to trust one another on a deeper level.
One plot idea could be that they start off as rivals but then have to team up to face a common enemy. During their time together, they gradually come to understand and respect each other on a deeper level, leading to a change in their relationship.
One character that would fit well is Robin. Her knowledge of the world and its secrets could be relevant if there's some mystery involved in the Zoro - Mihawk relationship. Brook, with his unique personality and his own skills as a swordsman, could also be included. He could have some interesting conversations with Zoro and Mihawk about swordsmanship. And Shanks, as a great swordsman himself and a significant figure in the One Piece world, could potentially play a role in the story, perhaps as an old acquaintance of Mihawk.
One common theme is rivalry. Their relationship in the original story is based on Zoro's ambition to defeat Mihawk, and this often carries over into fanfiction. Another theme is respect. Despite being rivals, they also respect each other's skills as swordsmen. For example, in many fanfictions, Mihawk acknowledges Zoro's potential even when he defeats him.
In a Mihawk x Zoro fanfic, the relationship could be developed in various ways. For example, they could train together, leading to exchanges of swordsmanship knowledge. This could be a great opportunity to delve deeper into their individual fighting styles and how they might influence each other. Also, the power dynamics between them would be a key aspect, as Mihawk is one of the strongest swordsmen and Zoro is determined to reach that level.
Maybe in the fanfiction, they get stranded on an island. Fem Zoro tries to find a way off while Sanji discovers rare ingredients on the island. As they spend time together, they start to understand each other better. Sanji realizes Fem Zoro's determination is just as strong as a man's, and Fem Zoro sees Sanji's kindness beyond his flirty nature.
One idea could be that they team up to face a new, extremely powerful enemy that threatens the balance of the New World. This enemy could be a former Rocks Pirate member who was in hiding and now has a plan to take over. Shanks and Mihawk, despite their differences, realize they need to combine their skills.
One of the things that makes it appealing is the clash of their personalities. Mihawk is refined and calculating, while Zoro is brash and passionate. In yaoi fanfiction, this contrast can lead to some really engaging storylines. Writers can explore how they come to understand each other better, and how that understanding blossoms into a relationship. It also gives fans a chance to see these two beloved characters in a different light, outside of the normal canon interactions.
There's also 'Mihawk's Apprentice'. In this fanfiction, Zoro somehow becomes Mihawk's apprentice. It shows a different side of their dynamic, as Mihawk imparts his knowledge and skills to Zoro in a rather strict but also caring way. It's an interesting read for those who like to see their relationship from a more mentor - mentee perspective.
One common theme is the pursuit of strength. Zoro is always looking to become stronger, and Mihawk represents a pinnacle of swordsmanship. So, in fanfics, this often leads to Zoro seeking guidance or challenges from Mihawk.
For a dracule mihawk crossover fanfiction, a great plot could involve crossing over with the One Piece world but in an alternate timeline. Maybe Mihawk teams up with Luffy at a much earlier stage. They could face new and unknown pirates together. Also, a crossover with the Bleach universe. Mihawk could enter the Soul Society and his sword skills could be compared to the Zanpakuto abilities of the Soul Reapers. He might even engage in battles with some of the powerful captains.