One possible plot could be Percy using his Uchiha heritage to gain new powers. For example, he might unlock the Sharingan which could enhance his battle perception in the demigod world. He could then use this newfound ability against his enemies, like the Titans or monsters. This would create a whole new dynamic in the Percy Jackson universe as he combines his demigod skills with Uchiha powers.
Yes, there might be such fanfictions out there. The Percy Jackson series and the Naruto world with Madara Uchiha are both quite popular, and fans often like to cross over different universes in fanfiction. It could be really interesting to see how Percy Jackson, with his own set of powers and personality from the Greek mythology - based world, would react to or be a fan of the powerful and complex Madara Uchiha from the Naruto universe.
Percy's power set would be different. Instead of just relying on his demigod powers, he would have access to Uchiha abilities. This would make him more complex in combat. He could be more strategic, using the Sharingan to analyze his opponents' moves before striking. Also, his relationships with other characters might change. Some might be afraid of his new powers, while others might try to use him for their own gain.
Well, the plot could be centered around Percy's attempts to bridge the gap between his father Poseidon and his grandfather Zeus. There have always been tensions between the two gods. Percy, using his unique position, tries to bring peace. But there are forces at work, like some rogue demigods who don't want peace between the two powerful gods. They try to sabotage Percy's efforts, leading to a series of adventures and challenges for Percy.
One possible plot could be Percy discovering his relation to Dumbledore. Maybe he starts having strange dreams or visions that lead him to the wizarding world. He then has to learn about his new family connection while also trying to keep his demigod identity a secret from most of the wizards, as they might not understand it.
Well, one possible plot could be that Percy discovers his new relation to Hephaestus later in his adventures. He might then start to have an affinity for creating and fixing magical items, which could be a new skill for him in battles against monsters. He could also meet other descendants of Hephaestus who teach him more about his heritage.
In a fanfiction, Madara Uchiha's grandson could have unique powers. Since the Uchiha are known for their Sharingan, perhaps he has an evolved form of it. He could use this power to protect the Hidden Leaf Village, or maybe he gets caught up in a conflict between different ninja clans who either want to use his power or are afraid of it.
In fanfiction, the author could create a scenario where there was a secret relationship between an Uzumaki ancestor of Naruto and an Uchiha. This relationship could have been hidden for generations. And through some family secrets being revealed, it's discovered that Naruto is actually Madara's grandson. It could also involve some kind of genetic manipulation or curse that ties the two families together in a way that wasn't known before.
One possible plot could be that Naruto discovers his true heritage as Madara's grandson gradually. This revelation shakes his world as he has to come to terms with being related to a once - feared enemy.
One way the story could develop is that Naruto would have an innate understanding of powerful Uchiha techniques. Since Madara was a master of the Sharingan and had many powerful jutsu. Naruto might be able to quickly master the Sharingan if he inherits it. For example, he could use it to enhance his combat abilities against stronger enemies. He could also have a different relationship with Sasuke. Maybe instead of being rivals, they could be more like cousins with a shared heritage to explore.
One possible plot could be that Naruto, as the Hokage, discovers the existence of Madara's grandson. He might initially be wary but then realizes that the grandson has no intention of following in Madara's evil footsteps. Instead, he could be a young ninja with unique abilities who wants to use his powers for good. Naruto then takes it upon himself to train the young boy, passing on his own values and skills.