One possible plotline could be Naruto exploring and mastering long - lost Konoha jutsu. He might discover ancient scrolls in the village's archives and start to practice the forgotten techniques. Another could be Naruto teaching the younger generation these special jutsu, passing on the Konoha heritage.
Well, perhaps in the fanfic, Naruto becomes a Konoha Jutsu Master by facing a series of challenges. He has to compete with other ninjas from different villages who also want to learn Konoha's jutsu. During this process, he not only masters the jutsu but also learns about the true meaning of being a ninja from Konoha. He could also use his new - found mastery to protect Konoha from a powerful enemy.
In this fanfic, Naruto could start as an apprentice to an old and wise Konoha jutsu master. He would learn the secrets of Konoha jutsu step by step. As he progresses, he might come across some dark secrets related to the jutsu. For example, some jutsu were created for not - so - noble purposes in the past. Naruto, with his strong sense of justice, would then try to reform or improve these jutsu while still becoming a master of them. He could also use his skills to bridge the gap between different ninja clans within Konoha by teaching them all the valuable jutsu he has learned.
One possible plotline could be that Naruto discovers a deep conspiracy within Konoha that makes him feel betrayed. For example, he might find out that some of the village elders have been using him all along as a tool to gain power. So in his rage, he decides to take revenge on the village. He could start by using his shadow clones to create chaos and disrupt the normal operations of Konoha.
Sasuke could be a rival. Even though they are friends, Sasuke is also a very powerful ninja. He might see Naruto's progress as a Konoha Jutsu Master and feel the need to compete to prove himself. Another could be Neji. Neji is highly skilled and might not be entirely happy with Naruto getting so much attention as a jutsu master.
One possible plotline could be that Naruto is somehow mind - controlled. Maybe an enemy uses a powerful genjutsu on him, making him see the Konoha 12 as threats to the village instead of comrades. This would lead to a tragic situation where Naruto, in his altered state of mind, attacks them.
There could be a jutsu that allows for instant teleportation across long distances. This jutsu might be a new discovery in the fanfiction world, perhaps created by a character who has been experimenting with space - time ninjutsu. They might use it to quickly get in and out of battles or reach far - off places in a blink.
One possible plotline could be that Naruto discovers this new jutsu during a difficult battle. He then uses it to turn the tide of the fight, much to the surprise of his opponents and allies alike.
A possible plotline could be that Sakura is from a secret organization against Konoha. She is sent as a spy, but as she lives in Konoha, she starts to question her loyalty and falls in love with the village and its people.
A plotline might involve Naruto's family physically harming him in the fanfic. This could be out of anger or because they see him as a burden. They might also isolate him from the rest of the family, not allowing him to participate in family gatherings or traditions. This would make Naruto feel even more alone and unwanted. And perhaps they spread false rumors about him in the village, which further ostracizes him from the community.
One possible plot could be a misunderstanding within Konoha. Maybe some false information is spread about Naruto being a threat. Some radical elements in Konoha then take it upon themselves to eliminate him, believing they are protecting the village.
Perhaps in the 'naruto attacks konoha fanfic', Naruto is being influenced by a new and powerful villain who has convinced him that Konoha's shinobi are corrupt. So, Naruto decides to take matters into his own hands and attacks the village to 'purify' it. It could also be that Naruto has some sort of misunderstanding about a decision made by the Konoha elders that he thinks is so wrong it warrants an attack on the village.
One possible plotline could be exploring their shared heritage. Maybe they discover they are brothers early on and team up against the darker forces in the Naruto universe. They could use their combined powers to bring about a new era of peace in the shinobi world.