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.
It's possible in fanfiction, but it would require a lot of creative liberties. Broly is a Saiyan with incredible power, and Tsunade is a powerful ninja with her own unique abilities. Combining their characteristics to create a story where Naruto is their son would mean melding the two universes' lore. For example, you'd have to figure out how Naruto would inherit Saiyan powers like the ability to transform, along with his ninja skills. It could be a really fun and action - packed story if done right.
He would likely have a combination of Saiyan and ninja powers. From Broly, he might inherit super strength, the ability to fly, and the Saiyan's battle - ready instincts. And from Tsunade, he could get her medical ninjutsu skills and her superhuman strength that she has as a Senju. He might also have a unique form of chakra control that combines the raw power of Saiyan energy with the more refined ninja chakra.
Yes, there are likely fanfictions out there with the concept of 'naruto is broly'. Fanfiction writers often come up with creative crossovers like this. You can try searching on popular fanfiction websites such as FanFiction.net or Archive of Our Own.
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.
Since Broly has a rather wild and untamed personality, Naruto could learn to be more in touch with his primal instincts. This doesn't mean Naruto would become a brute, but rather he could find a new balance between his kind - hearted nature and a more aggressive side when necessary. For example, in negotiations or battles, Naruto could be more intimidating. Also, Broly's loyalty to his own beliefs (even if they are sometimes extreme) could inspire Naruto to be more firm in his own ninja way.
One idea could be a crossover where Naruto and Female Broly end up in the same universe due to a strange rift in space - time. Naruto is initially cautious of Broly's power but soon realizes she has a good heart. They team up to fight a common enemy that threatens both their worlds.
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.
In fanfiction, Naruto and Broly might share similarities in their origin stories. Naruto was an outcast in the Hidden Leaf Village at first because of the Nine - Tails inside him. Similarly, Broly was treated differently due to his unique and powerful nature. Their sense of isolation in some versions of fanfiction can lead to them having a similar character arc of finding their place and purpose in the world. And their physical strength is often emphasized in a comparable way in fanfictions.
First, understand the characters well. Know Broly's aggressive and powerful nature from Dragon Ball and Naruto's growth - oriented and determined character. Then, create a unique plot. Maybe have Broly arrive in the Naruto world through a strange portal. Keep the action scenes exciting, like when Broly uses his Ki blasts against Naruto's jutsus.