A cool plot could be time traveling to a point where a powerful and lost duel monster card was created. The character has to face challenges and duel against ancient duelists to obtain the card. This card then becomes a key factor in a major tournament in their own time. Or, they travel to a time when the Zexal powers were first discovered and get involved in the events that led to their development, changing the course of history in the process.
Another interesting plot might be a time - travel fanfiction where a Barian is sent back in time to the early days of the Yugioh Zexal world. They have to adapt to the different dueling styles and social norms while also trying to figure out a way to return to their own time, all while having an impact on the events that will shape the future.
One idea could be to cross Yu - Gi - Oh Zexal with another popular anime like Naruto. Characters from Zexal could end up in the Naruto world and have to duel using their cards against ninja powers. For example, Yuma could team up with Naruto to face a common enemy. Another idea is a crossover with Pokemon. Picture Yuma trying to catch Pokemon with his duel disk or having a Pokemon battle that's also a duel. A third idea could be a crossover with a superhero universe, where the Zexal characters gain superpowers in addition to their dueling abilities and fight villains together.
One idea could be a female OC who is a powerful duelist from a far - off land. She comes to the Zexal world with a unique deck that has cards no one has ever seen before. This could lead to exciting duels and interactions with the main characters.
One idea could be to crossover Yugioh Zexal with another popular anime like Naruto. The characters from Zexal could find themselves in the Ninja world and have to adapt to new rules of dueling. For example, they might have to use their duel monsters in combination with ninja techniques.
Another plot could involve a time-traveling duel. A powerful duelist from the future uses time-travel technology to come back to the GX era to challenge Jaden. The duels would have new rules and cards from the future, making it a very exciting and different kind of duel for Jaden and his friends to face.
Kite would approach time travel with a strategic mindset. He'd be looking for ways to gain an advantage, like finding new duel monster cards or techniques that he could bring back to his own time. Rio would be more concerned about the well - being of others. If she saw people in trouble in the time she traveled to, she'd try to help. Tori would be in awe. She'd be fascinated by the different cultures and dueling styles she'd encounter, and she might document her experiences in a journal.
One idea could be a character from the future traveling back to the early days of the Academia. They could try to change the course of events that led to the war and destruction in their time. Maybe they have some hidden knowledge about a powerful card that was misused and they want to prevent that from happening.
Perhaps a story where a young, new duelist discovers they have a vampire heritage. They struggle to control their newfound powers while also trying to fit into the competitive dueling world. They might face discrimination from other duelists who fear their vampire nature, but they gradually prove themselves with their unique skills and deck strategies.
One idea could be exploring the backstories of the minor characters more in - depth. For example, what led them to become duelists in the first place. Another could be a time - travel plot where a character goes back to a crucial moment in the Zexal universe's history and changes something, leading to a whole new set of events and challenges. A third idea is to create a fanfiction where the main characters have to face a new, unknown type of duel that tests their skills and relationships in ways they haven't experienced before.
One interesting plot could be a character going back in time to prevent a certain card from being created, which then changes the whole Yu - Gi - Oh! tournament scene. For example, if the Blue - Eyes White Dragon card was never created, how would the power balance shift among duelists?