Well, he would probably become extremely powerful. He could gain the ability to transform into a Super Saiyan, which would boost his strength, speed, and energy projection to incredible levels. His ninja skills combined with Saiyan power would make him nearly unbeatable in battles.
It could also be due to a strange prophecy. In both the Naruto and Dragon Ball worlds, prophecies play a big role. There could be a prophecy that a hero from one world would gain the powers of the other to defeat a common enemy. Naruto, being the hero of his world, is chosen and through some spiritual or magical transformation, he becomes a Super Saiyan.
Well, in this kind of fanfiction, it might happen through some sort of cross - dimensional magic. Maybe there's a rift between the Naruto universe and the Dragon Ball universe that allows Naruto to gain the power of a Super Saiyan God. It could also be the result of a powerful wish made by a god - like character who decides to give Naruto this new form for the sake of saving his own universe or something like that.
If Naruto becomes a Saiyan in fanfiction, his relationship with his mentor, like Jiraiya, could be different. Jiraiya would have to guide Naruto in handling these new Saiyan powers. Naruto's friends might be both in awe and a little scared. For example, Sakura might be worried about Naruto losing control of his new powers. And his relationship with the villagers could change too. Some might see him as an even greater protector, while others might fear his new, more alien - like powers.
Sure, there are probably fanfictions with this concept. Fanfic writers are known for their creativity in crossing over different fictional worlds. A 'Naruto is half Saiyan' story could explore how Naruto's life and the Naruto - verse in general would be affected. For example, how would his relationships with his friends and enemies change? How would the ninja world react to his new Saiyan abilities? It could also delve into the backstory of how he came to be half Saiyan, perhaps some kind of inter - dimensional or time - traveling event.
One possible plot could be that Bulma, being the brilliant scientist she is, discovers a way to artificially give herself Saiyan DNA. She might do this out of her fascination with the Saiyans' power and their warrior culture. This newfound Saiyan side of her could lead to her training with the Z - fighters, much to everyone's surprise. She would have to adapt to the Saiyan's love for battle and their physical abilities, like their rapid power - up after near - death experiences.
Well, there could be a story where a female Saiyan ends up in Konoha. She might start her own training regime for the ninja there, introducing them to Saiyan - style training methods. This could lead to some of the Konoha ninjas achieving new levels of power. Also, a plot could revolve around a female Saiyan falling in love with a Naruto character, say Sasuke, and how their relationship unfolds while dealing with the differences in their powers and cultures.
I'm not sure exactly as it depends on the specific fanfiction. It could be a story that combines elements of Naruto and Saiyan from Dragon Ball. Maybe it has Naruto with Saiyan - like powers or in a Saiyan - dominated universe.
Sure, it's possible. Fanfiction allows for all kinds of wild and imaginative ideas. In a 'Naruto is a Saiyan God' fanfiction, the writer could combine the ninja world of Naruto with the Saiyan lore. Maybe Naruto would gain Saiyan abilities like super strength, the ability to fly, and the iconic Super Saiyan transformations. It could also lead to interesting storylines where Naruto has to deal with new enemies or protect his village in a whole new way, using his Saiyan God powers.
Naruto as a Saiyan? That'd be insane! He'd have insane physical strength, the ability to go Super Saiyan, and it might even affect his relationships with the other characters in unexpected ways. The potential for adventure and excitement would be through the roof!