Perhaps a fanfic where Naruto's blood has some special connection to an ancient and powerful demon. The demon is slowly being awakened due to some dark magic related to Naruto's blood. Naruto has to face not only the threat of the demon but also the distrust from some in the village who think his blood is a danger. He must prove that he can control this situation and keep the village safe.
In a 'dark blood Naruto fanfic', the dark blood could give the wielder the ability to see the darkest secrets of others. Naruto, with his new power, uncovers a conspiracy within the ninja world that is far more dangerous than anyone thought. He has to use this power, which is feared by many, to save the world while also dealing with those who want to stop him because of his 'dark' ability.
Another plot could involve Naruto having to deal with a hidden power within the Blood Prison that is starting to corrupt the inmates and guards alike. He has to find the source and stop it. For example, there could be an ancient curse that was placed on the prison long ago and is now awakening. Naruto, with his strong will, tries to resist the curse's influence while also finding a way to break it for everyone else.
Well, you could write a fanfic that focuses on the backstories of the characters in 'Blood of Olympus'. Maybe explore how Percy Jackson became the hero he is from a different perspective. Or create a plot where the gods interfere more directly in the demigods' quests in the fanfic. This could add more drama and tension as the demigods have to deal with the gods' complex personalities and motives on top of their existing challenges.
Another plot could focus on the origin stories of some of the side characters. For instance, the backstory of Yukina Himeragi. How did she become an attack mage? What kind of training did she go through? A fanfic could expand on this and also show how her past experiences influence her actions and relationships in the present story.
One idea could be exploring the backstories of the characters more deeply. Maybe delving into their childhoods and how those experiences shaped them into the people they are in the story. Another could be creating an alternate universe where the main characters have different occupations or abilities.
One idea could be a character who discovers they have blood - bending abilities in the Naruto universe and has to hide it from their village at first. Maybe they are from a non - water - based village and fear being ostracized. Another plot could involve a blood - bender using their power to heal instead of harm, which goes against the traditional view of blood - bending in other fictional universes. A third idea might be a blood - bender who gets caught in the middle of a war between two great ninja powers and has to decide which side to use their power for.
An interesting plot idea for Naruto fanfic might be to focus on the life of a minor character. For instance, what if we told the story of a genin who never made it to be a chunin but still had a significant impact on the village in some other way? Or a story where all the ninja abilities are suddenly switched among the characters, and they have to adapt to these new powers while still facing their usual enemies. This could lead to some really fun and unexpected character interactions.
Another plot idea could be Percy having to deal with the moral implications of his blood - bending ability. He might struggle with whether it's right to control something so fundamental to life.
One idea could be to explore the backstory of a minor character from the movie. For example, a young vampire who was turned during the wars but has unique powers. Another could be a love story between a vampire and a lycan that defies the age - old feud in the Underworld Blood Wars universe. Maybe they team up to stop a greater evil that neither side was aware of.
Well, you could focus on a love story set within the 'a tale of blood and steel' world. For example, a warrior from one side falling in love with a healer from the opposing side. Their relationship would be full of challenges as their factions are at odds. Or, you could write about a young apprentice who discovers a dark secret about the ruling class in the 'a tale of blood and steel' and has to decide whether to expose it or keep it hidden, knowing that either choice could have dire consequences.