Well, one possible plot could be that Naruto's friends and family rally around him. They might search for a cure across different hidden villages. His friends like Sasuke could put aside their differences and use their combined skills to find a way to heal him.
Hinata would also be important. Given her love for Naruto, she would be at his side constantly, providing emotional support. And Kakashi, as Naruto's former teacher, might offer his wisdom and experience in dealing with difficult situations like this.
Well, perhaps in the fanfiction, Ron and Hermione go on adventures outside of the UK. They could be exploring new magical cultures and using their combined skills. Hermione's vast knowledge and Ron's practical magic skills would make them a great team. They might also be starting a family and facing the difficulties that come with raising magical children in a world that's still recovering from the war.
One possible plot could be Harry and Ginny starting a family. They might face some challenges in raising their children in a post - Voldemort wizarding world. For example, dealing with the after - effects of the war on the wizarding community and how it impacts their family values.
The plot could involve the dark knight, who is terminally ill, on a final quest. He might be seeking a cure in a world full of dark magic or ancient secrets. Along the way, he has to face his enemies one last time, using his remaining strength and wits, knowing that his time is limited.
His friends like Sakura, who is a medic - ninja, would surely be the first ones to try to help. She could use her medical knowledge and skills to diagnose Naruto's illness.
Maybe Naruto's illness is a result of some dark jutsu used against him. His illness could lead to him being unable to perform his ninja duties, and so his friends, like Sasuke and Sakura, have to take on extra missions to protect the village while also trying to find a way to heal him. They could search through ancient ninja scrolls for a remedy.
Another possibility is that they are lured into a trap set by Voldemort in the Forbidden Forest. In the fanfiction, they might encounter a series of dark magic spells and creatures that they have to fight off together. This would test not only their magical abilities but also their love and trust for each other.
One common theme is the power of friendship. Naruto's friends would try their best to support him. Another is the exploration of mortality. Naruto would have to face his own death, which is a big change from his usual fearless self. And there could be the theme of hope against all odds, as his friends search for a miracle cure.
Well, one possibility could be that Naruto somehow gains the ability to perform bankai. He might use it in a battle against a powerful new enemy. For example, he could combine his own ninja skills with the unique powers of bankai to create a whole new combat style that surprises his foes.
Perhaps in this fanfiction, Naruto discovers that he has some unique weapon - like abilities that are different from his normal jutsu. It could lead to a whole new adventure where he has to learn to control this 'weapon' aspect of himself while still being true to his friends and the village.