One interesting plot could be the discovery of an ancient prophecy that states a person with a specific Zanpakuto bloodline will be the key to saving the Naruto world from an impending doom. This person is initially unaware of their bloodline and must go on a journey of self - discovery. As they do, they learn about the power of their Zanpakuto and how it relates to their bloodline. They face numerous challenges, including battles with other powerful ninjas who want to use the prophecy for their own gain.
Imagine a fanfic where the Zanpakuto bloodline is a result of a long - forgotten experiment by an ancient ninja clan. In the present day of the Naruto world, a young ninja discovers they have this bloodline. Their Zanpakuto has unique abilities that are different from normal ninja tools. As they explore their powers, they attract the attention of different factions in the ninja world. Some want to study them, some want to use their power for evil, and others see them as a threat. The young ninja has to navigate through these complex relationships while also trying to master their Zanpakuto and understand their bloodline.
One idea could be a story where the main character discovers their Furyan bloodline late in their ninja training. This newfound power could cause conflict with their village at first as they struggle to control it. Then, they go on a journey to learn about their bloodline's origin and meet other characters with similar powers.
One idea could be a character with a devil bloodline being initially shunned in the Hidden Leaf Village but then proving their worth in a major battle. For example, they could use their unique devil - like abilities, such as enhanced speed and strength, to turn the tide against a powerful enemy.
Perhaps in the fanfic, the hypnosis bloodline allows the user to enter people's minds and change their memories. The story could be about a character who uses this ability to rewrite the past of a village that has been corrupted by an evil force. However, they soon realize that changing memories has unforeseen consequences and they have to find a way to fix the mess they've created.
Well, you could create a fanfic around a bloodline limit that combines elements of different existing ones. Say, mixing the Sharingan's ability to copy techniques with the Byakugan's long - range vision. This new bloodline limit could give the wielder an almost unbeatable advantage in battle. Also, a bloodline limit that gives the power to manipulate the elements in ways not seen before, like creating hybrid elements easily.
A really interesting plot could be that the Kyuubi bloodline in Naruto starts to have an effect on his relationships. Some people in the village might be afraid of him now that they know he has this powerful bloodline. On the other hand, some might see him as an even greater asset. Naruto then has to deal with the social implications while also training to control the new powers that come with his Kyuubi bloodline. He could also find out that there are other ninja out there with a similar bloodline from other tailed beasts, and they come together to form a unique group.
Another plot could involve a new character introduced into the Naruto world who is already a master of the Zanpakuto. This character could come from a far - off land where the knowledge of Zanpakuto is common. They could offer to teach some of the young ninja in Konoha about the Zanpakuto, but there are those in the village who are suspicious of this new power and the new character, creating a lot of tension and drama within the village.
Maybe in the fanfiction, Naruto is transported to the Soul Society where he is given dual zanpakutos as a way to help him in a great battle against a common enemy. The zanpakutos could have special abilities related to his own chakra nature, for example, one could enhance his wind - style jutsu while the other could be used for defense with a special chakra shield.
Well, one interesting idea could be the unique combinations of Naruto's abilities with multiple zanpakuto powers. For example, if Naruto could use the speed and cutting abilities of a zanpakuto in his combat style, it would add a whole new dimension to his fighting. Another idea might be the different forms of the zanpakuto that Naruto could unlock, similar to how he has different forms of his own jutsu.
In a fanfiction, you could have a scenario where an enemy uses a dark form of Bakuton bloodline power. Naruto and his comrades must find a way to counter it. They seek out an old hermit who has some knowledge of the Bakuton bloodline's weaknesses. Along the way, they learn more about the bloodline's connection to other elemental powers in the Naruto world, and how it can be used for both destruction and creation.
One idea could be a story where a character with the Shikotsumyaku bloodline discovers a new and powerful bone - related ability that no one in their clan has ever had before. This could lead to them being both feared and respected within the Naruto universe.