It could change the power dynamics in the village. In the normal Naruto storyline, as Naruto grew in rank, he became a symbol of hope and strength for the village. If he remains a genin, there could be a power vacuum at the higher ranks that other characters might try to fill. This could lead to new rivalries and alliances within the village. And Naruto himself might have to find new ways to prove his worth, not just through rank but through his actions and the unique skills he develops at the genin level.
Since Naruto is still a genin, he may not be allowed to participate in certain high - level missions. This could limit his exposure to different parts of the ninja world and delay his overall growth in terms of knowledge and experience. However, it could also lead to him finding creative ways to get involved in important matters, like sneaking into missions or solving problems from the sidelines. Also, his relationships with other characters might be affected. For example, some characters who only respect higher - ranked ninjas might not take him seriously.
One consequence could be that he might face more discrimination from the village elders. In the original story, as Naruto advanced in rank, he gained more respect. But as a genin here, he could still be seen as a troublemaker. Another consequence is that his training might be different. He might focus more on basic genin - level skills, which could make him even stronger in the long run as he masters them to a higher degree.
Maybe the author wants to explore more of Naruto's growth at the genin level. There could be many untold stories and character developments that can happen during this stage. It gives the author more space to show Naruto's relationships with his friends, like Sasuke and Sakura, in a different light while still being a genin.
Naruto may be forced to fight in battles or do tasks that he doesn't want to do. His skills and powers could be misused by Rias for her own purposes. Also, his relationships with his friends in his own world might be affected as he is enslaved in another world. He may not be able to return to his home or communicate with his friends, which could cause a lot of emotional distress for him.
Naruto might become more determined. He's the type who turns negative things into positive motivation. So, Sakura's meanness could make him strive harder to prove himself.
He might start to compare the fanfiction world too much with the real Naruto story, which could lead to some confusion. For example, if a fanfiction has a completely different view of a character's personality, he may struggle to separate it from the original.
She might spend a lot of time reading and writing fanfiction, which could lead to less time for other activities like socializing or doing school/work - related tasks.
One consequence could be that Naruto has some new powers or abilities. Since the Shinigami is a very powerful and mysterious being, its intervention might leave a mark on Naruto in the form of newfound powers.
He might have physical injuries that could slow him down in his training or his future battles. For instance, if he gets a deep wound on his leg, it would affect his mobility.
One possible consequence is that it could change the dynamics of his battles. He could easily surprise his enemies and gain an upper hand in combat. For example, he could sneak up on opponents and land a powerful attack without them even realizing he was there.
If his education is sabotaged, Naruto may also face difficulties in understanding the complex political and social aspects of the ninja world. This could lead to him making wrong decisions or being easily manipulated by others who are more informed. He might struggle to form alliances or navigate the power dynamics within the Hidden Leaf Village and among other ninja villages. Moreover, his relationships with his peers could be affected as they might progress faster in their training while he lags behind due to the sabotaged education.
He might be disqualified. If Naruto gets hurt badly during the Genin Exam in fanfiction, the examiners could decide that he is no longer fit to continue and thus disqualify him. This would be a huge setback for him as becoming a Genin is his big dream.