In this type of fanfiction, Naruto might get stabbed while on a solo mission. He could be infiltrating an enemy base when he is discovered and stabbed during his attempt to escape. Maybe he gets into an argument with a fellow villager who has been secretly turned against him, and in the ensuing struggle, he gets stabbed. Also, there could be a scenario where a powerful dark force from outside the village targets Naruto specifically, and after a fierce battle, Naruto is stabbed by one of the minions of this dark force.
Well, in 'naruto gets stabbed fanfiction', it could be that Naruto is exploring a new and dangerous area where he encounters a powerful and hostile ninja. In the heat of the fight, this ninja manages to land a stabbing blow. It might also be that Naruto is weakened due to some prior injury or chakra depletion, making him more vulnerable to being stabbed by a regular enemy. And, there could be a situation where Naruto is under the influence of some sort of genjutsu that impairs his ability to defend himself and thus gets stabbed.
Well, in some 'Peter Parker Gets Stabbed' fanfiction, it might happen during a fight with a new, powerful villain. The villain could have a weapon specifically designed to harm Spider - Man, like a blade coated with a substance that weakens his healing factor. Peter might get stabbed while trying to protect someone, like MJ or Aunt May. And then he has to deal with the injury, hiding it from his loved ones while also trying to figure out how to defeat the villain before the wound becomes too much to handle.
In 'naruto gets angry fanfiction', one possible scenario could be that Naruto gets angry when he discovers someone has been mistreating his friends in the village. He might immediately confront the wrongdoer with his signature rasengan at the ready.
Well, in some fanfictions of this kind, Naruto could be tortured physically by being chained up and beaten. His captors might also starve him or deprive him of water to weaken him. It could also be that they use some sort of dark magic or forbidden techniques on him that cause extreme pain and discomfort.
In a 'naruto gets bullied fanfiction', perhaps Naruto is bullied by the children of the more respected ninja clans. They could use their family's status to intimidate him and make him feel inferior. They might also spread false rumors about him, which further isolates Naruto from the rest of the village.
One possible scenario could be that Naruto gets pissed off when he discovers someone has been spreading false rumors about his friends in the fanfiction. This would really push his buttons as he values his friends highly.
One possible scenario could be that Naruto is constantly taunted in the streets. The villagers might throw things at him or call him mean names, like 'demon brat'. Another could be that they exclude him from village activities, making him feel like an outcast.
One possible scenario could be a power imbalance. Maybe Sasuke discovers some new, extremely powerful jutsu that Naruto has no defense against. For example, a jutsu that can nullify Naruto's chakra or attack his spirit directly. Another possibility is a miscommunication or a breakdown in their relationship. If Sasuke believes Naruto has betrayed him in some way, his anger could lead him to kill Naruto. However, this goes against the core of their bond in the original series.
In the 'naruto gets chakra chains fanfiction', perhaps Naruto discovers that the chakra chains can be used to connect with other people's chakras in a positive way. For example, he could use them to heal his friends or share his chakra more efficiently. Also, it could be that the chakra chains are a sign of a new power level for Naruto, which makes him a more formidable opponent against stronger enemies.
One possible plot development could be that Naruto's friends rally around him to protect him while he recovers. They might seek revenge on the one who stabbed him.
In a 'naruto gets pissed off fanfic', one possible scenario could be that Naruto discovers someone has been slandering his friends behind their backs. He would get pissed off and confront the person directly, his eyes blazing with anger.