One possible plot twist could be that her family has a secret reason for neglecting her. Maybe they're trying to protect her from some greater danger. Another could be that she discovers she has a hidden power that makes her family regret their neglect.
Perhaps the Akatsuki's neglect is a part of a much larger plan by Naruto himself. He might be trying to lull the Akatsuki into a false sense of security while he's actually gathering information or power in the background. Then, when the Akatsuki least expects it, Naruto reveals his true intentions and uses the situation to his advantage, which would be a huge plot twist for the readers who thought Naruto was just being mean or indifferent.
One possible plot twist could be that the gun magic is actually a curse in disguise. Maybe it seems powerful at first, but it slowly starts to corrupt Fem Naruto, and she has to fight against its dark influence.
Well, a typical plot twist is that Naruto leaves the village due to the neglect. He then returns as a much stronger and more mysterious figure. This forces his family to re - evaluate their actions. Another common plot twist is that the sister is actually in danger, and Naruto is the only one who can save her, despite the family's past treatment. It flips the situation and shows that Naruto is still the bigger person. And sometimes, a plot twist could be that Naruto has a secret heritage that was the real reason for the family's strange behavior towards him.
A plot twist could be that Naruto discovers that his family's neglect was actually part of a bigger scheme. In the harem fanfiction world, perhaps someone was manipulating his family to keep Naruto down so that they could have an advantage in the competition for Naruto's affection in the harem. This revelation would completely change Naruto's view of his family and the situation he's in.
One plot twist could be that Naruto discovers his parents had a very good reason for their neglect, like they were protecting him from a greater danger. Another could be that the village elders knew about the neglect but did nothing, and Naruto has to confront them. Or perhaps Naruto finds out he has a secret power that was the cause of his parents' seeming neglect, as they were afraid of what he could do.
A plot twist might be that Naruto, after being abandoned by his family, finds a new 'family' in unexpected places. For example, he could bond closely with a group of outcasts in the village who understand his pain. Or perhaps, the family's abandonment was part of a larger conspiracy within the ninja world, and Naruto's journey to uncover the truth behind it becomes a major part of the story.
It could be that Fem Sasuke is under some sort of mind - control when she kidnaps Naruto. A powerful enemy, like Orochimaru or a new villain, might have used a jutsu to make her do this. As the story progresses, Naruto would then have to find a way to break the mind - control on Fem Sasuke while also dealing with the situation of being kidnapped.
One possible plot development could be Naruto exploring his new bloodthirsty nature and how it affects his relationships with his friends. Maybe at first they are scared, but then they try to understand him. Another could be Naruto seeking revenge on his family for neglecting him, which might lead to some intense confrontations. And finally, he could find a new family among his comrades who accept him for who he is.
Well, a plotline could involve Naruto feeling more isolated due to family neglect and the Juubi's power becoming a sort of double - edged sword. On one hand, it gives him strength, but on the other, it makes him a target. Also, there could be a plot where Naruto tries to find out why his family neglected him through his connection with the Juubi, like if there are some secrets related to the Juubi that are linked to his family's actions.
There could be a plotline where the character with Mokuton is constantly compared unfavorably to other family members with different abilities. This leads to the character feeling inferior and trying to prove themselves. As the story progresses, they might discover a unique aspect of Mokuton that makes it even more powerful than expected. This newfound knowledge could be the key to not only getting the family's respect but also to solving a major problem in the Naruto world, like a powerful enemy threat or a natural disaster.