There could be. Fanfiction writers love to blend different fictional worlds. In this case, imagining Naruto as Broly's son would involve combining the ninja - themed Naruto world with the super - powered Dragon Ball world. It would require a lot of creativity to explain how such a relationship could exist, like maybe some kind of interdimensional or time - traveling plot device.
One possible plot could be that Harry, as the son of Broly, has an inborn, extreme power. He might struggle to control it at Hogwarts, much like he struggles with his normal wizarding abilities in the original series. His power could draw unwanted attention from dark wizards who either want to use him or destroy him out of fear.
A fanfiction like this could be a wild ride. First, Naruto would inherit Broly's raw power, which could make him a force to be reckoned with in both the Naruto and Dragon Ball universes. His training would likely be different, perhaps a combination of traditional ninja training and Saiyan - style battles. The story could also explore how Naruto's friends in the Naruto world would react to his new heritage. Would they be afraid? Would they try to help him control his power? And in the Dragon Ball world, Naruto would have to prove himself among the powerful Saiyans. It could be a story of self - discovery, friendship, and power struggles across two very different fictional universes.
He would be much more physically powerful. Instead of relying just on magic, he could use his Saiyan strength to solve problems. For instance, he might be able to break through magically locked doors with his bare hands.
Goku could be a likely ally. Despite their initial conflicts, Goku has a way of seeing the good in people. He might approach Broly and convince him that they can work together to win the Tournament of Power for their universe. Their combined strength would be a formidable force.
In a crossover with One Piece, Luffy could be an ally. Luffy is known for his open - mindedness and ability to befriend almost anyone. He would see Broly's power and might try to get him to join his crew or at least fight alongside him against common enemies. They could have some really fun interactions, like Luffy trying to make Broly laugh or share his love for food with him.