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.
One possibility is that Naruto is sent on a special quest by some unknown entity. During this quest, he encounters the same kind of divine energy that is required to transform into a Super Saiyan God in the Dragon Ball world. He then has to master this energy, which could be extremely difficult considering his different chakra - based power system. But through his determination and unique ninja skills, he somehow manages to merge the Saiyan God energy with his own chakra, thus achieving this incredible transformation.
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, 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.
Well, if Naruto goes Super Saiyan 3 in a fanfiction, he would likely gain an insane amount of power. His physical abilities would skyrocket. He could move at incredible speeds, and his strength might be enough to shatter mountains. His chakra would probably combine with the Saiyan power in some unique way, creating new and powerful jutsu.
In the fanfiction, perhaps there is a prophecy that Naruto will become a Super Saiyan God - like being. As he gradually transforms, his body and mind change. He starts to see the world in a different way. His new powers attract the attention of both friends and foes. His friends try to help him adjust, while his foes try to either steal his power or destroy him. The plot could revolve around Naruto's journey to master his new form, protect his loved ones, and save the ninja world from destruction that only he, with his new powers, can prevent.
The main character is Naruto for sure. But in this fanfiction, we might also see characters like Beerus, the God of Destruction from Dragon Ball. Beerus could be interested in Naruto's new - found power and either try to test it or be a threat to Naruto's world. Another important character could be Hinata. She would be concerned about Naruto's transformation and how it affects their relationship. Also, characters like Piccolo could be involved, perhaps helping Naruto understand the ki aspect of the Super Saiyan God power.
Well, one interesting concept could be the combination of Naruto's ninja abilities with the Super Saiyan God power. Maybe Naruto can use his chakra in a new way inspired by the Saiyan power, like having a golden chakra aura. Another concept might be the interaction between Naruto and characters from the Dragon Ball universe. For example, how would Naruto react to Goku's training methods or how would they team up against a common enemy.
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.
If Naruto becomes a super soldier in fanfiction, he may change in terms of his personality too. With great power often comes a sense of responsibility or in some cases, overconfidence. He could start to view himself as an even greater protector of the Hidden Leaf Village, but also might struggle with the newfound power and how it sets him apart from his friends. Also, the story could explore how the other characters react to this 'super' Naruto, whether they are in awe, jealous or feel more secure with him around.
If Naruto becomes super IQ in the fanfiction, he could potentially become a master of multiple fields. He could be an excellent diplomat, using his intelligence to negotiate treaties and alliances. He would also be a great inventor, creating new tools and weapons for the ninja world. His friends might be a bit in awe of his newfound intelligence at first, but they would soon realize that he's still the same Naruto at heart, just with a much sharper mind.
A possible storyline could involve Naruto discovering a new form of power that combines his chakra with Saiyan energy, leading to his Super Saiyan - like transformation. He might then face a new and extremely powerful enemy that only his new form can defeat. Along the way, his friends would be both amazed and a little worried about this new side of Naruto.