In the fanfic, it could be that Sasuke has been possessed by an ancient evil force. Naruto, being the only one powerful enough to face him, steps up. He first tries to understand what has happened to Sasuke. But when he realizes that there's no other way, he uses his most powerful form, like the Six Paths Sage Mode. He battles Sasuke all over the elemental nations. During the fight, Naruto breaks through Sasuke's defenses and destroys the evil within Sasuke. This could lead to Sasuke being reborn in a sense, free from the evil influence, but also weakened, and Naruto then has to help him regain his strength and purpose in a post - battle world.
Maybe in this fanfic, Sasuke has gone too far in his quest for power and revenge. He starts attacking innocent people or trying to take over the Hidden Leaf Village. Naruto, as the hero, has no choice but to stop him. Naruto could use his talk - no - jutsu at first, but when that fails, he resorts to physical combat. He might start with his basic Rasengan and gradually level up his attacks as Sasuke counters with his Chidori and other powerful jutsus. In the end, Naruto destroys Sasuke's evil intentions and either kills him or imprisons him, depending on the tone of the fanfic.
One possible plotline could be that Naruto, having a fundamental difference in ideology with Sasuke, decides to take a stand. Maybe Sasuke is on a path that Naruto believes will destroy the village or their friends. So Naruto uses his newfound powers, perhaps a combination of Sage Mode and Nine - Tails chakra, to directly confront Sasuke. Naruto could try to break Sasuke's resolve through sheer force and the power of their friendship memories.
One possible theme could be revenge. If the writer is bashing Sasuke, they might have Naruto seek revenge on Sasuke for his actions in the original story, like when Sasuke left the village. Another theme could be power display, showing Naruto's overwhelming power as he destroys Sasuke.
Yes, there might be such fanfics out there. In the Naruto fandom, with a large number of fans creating various types of stories, it's possible that some would write a story where Naruto destroys Sasuke in a way that could be seen as Sasuke - bashing. However, these kinds of fanfics may not be in line with the overall spirit of the original work which focuses on their complex relationship and growth.
One possible plotline could be that Naruto has a sudden and extreme power-up that makes him overconfident. This overconfidence leads him to challenge Neji in a spar that gets out of hand and he ends up 'destroying' Neji in the sense of completely overpowering him. Maybe Naruto has unlocked a new form of his chakra that Neji can't counter with his Gentle Fist technique.
In a fanfic with a female Sasuke, the plotline might include her using her femininity as a strength in the ninja world. She could be more in tune with nature - based jutsu, for instance, and use that to her advantage. Her journey could also involve breaking gender barriers in the Hidden Leaf Village. She might be the first female to attempt certain high - level ninja training or missions. And her relationships with other characters like Sakura could be more complex, with a mix of competition and sisterly support as they both strive to be great ninjas in their own ways.
One possible plotline could be a comical situation where Sasuke is exasperated with Naruto's silly behavior and decides to 'spank' him as a form of discipline in a very light - hearted and friendly way. It could be part of their banter and growth as friends.
Well, it might show Sasuke being put in compromising situations by Kabuto's schemes. For example, Kabuto could use his medical ninjutsu knowledge to create illusions that mislead Naruto into believing Sasuke is unfaithful. The plot could then revolve around Naruto's reaction and how he tries to uncover the truth.
One common theme could be redemption. Even though Naruto is 'destroying' Sasuke, it could be seen as a way to save him from a path of self - destruction. Another theme might be power struggle. The idea that Sasuke's pursuit of power has led him astray and Naruto, with his own power, has to put an end to it. Also, friendship could be a theme. Naruto might be doing this out of a sense of love for his friend, that he can't let Sasuke continue down this dark path.
One possible plotline could be that Naruto and Fem Sasuke face a lot of challenges as they prepare for the arrival of their baby. Maybe they have to deal with the reactions of their friends and the ninja community, who might have mixed feelings about their relationship and the upcoming birth.
One possible plotline is that Sasuke and Hinata are sent on a diplomatic mission to another village. Along the way, they encounter various threats and have to work together to overcome them. This would allow for their relationship to develop as they see each other's skills and personalities up close.