One possible plot for this fanfiction could be that Naruto is initially unaware of his connection to Inuyasha. But as he grows older and faces tougher challenges, he starts to have strange dreams and visions. Eventually, he discovers his true heritage. This discovery could lead to a journey of self - discovery where he has to learn about the ways of the Inuyasha's world, like how to control his demon blood (if he has any) and how to use Inuyasha - like powers effectively, all while still being a ninja in his own world.
In a 'naruto son of inuyasha fanfiction', the plot might involve Naruto facing enemies that are both from the ninja world and have some connection to the demons in Inuyasha's world. For example, he could encounter a group of ninja who have made a pact with demons and are using their powers for evil. Naruto, with his combined heritage, would have to figure out a way to stop them using his wits and his diverse set of skills.
One possible plot could be that Naruto discovers he has a long - lost brother who is Inuyasha. They meet in a strange dimension where the worlds of Naruto and Inuyasha collide. Naruto, being his usual self, wants to understand his new - found brother and tries to bond with Inuyasha. Inuyasha, on the other hand, is initially skeptical but gradually warms up to Naruto as they face common enemies together in this new merged world.
The demons from Inuyasha's world that resent the idea of a half - human, half - demon having such a powerful combination of abilities could be villains. They might see Naruto as a threat to their existence or way of life and try to eliminate him. Also, there could be ninja who are jealous of Naruto's newfound powers and team up with these demons to take him down.
One possible plot could be that a character from Naruto with the Rinnegan somehow gets transported to the Inuyasha universe. Maybe they team up with Inuyasha and his friends to fight a common enemy. For example, the power of the Rinnegan could be used to counter some of the powerful demons in the Inuyasha world. The character might also introduce new jutsu or abilities to the Inuyasha gang, which could change the way they fight battles.
One interesting plot could be that Naruto and his friends are on a mission and accidentally end up in Inuyasha's feudal Japan through some sort of magic portal. There, they meet Inuyasha and his group. Naruto's ninja skills could be put to the test against the demons Inuyasha usually battles. And perhaps they team up to defeat a powerful common enemy, like a super - strong demon that neither group could handle alone.
The plot could involve the Juubi's chakra influencing some of the demons in the Inuyasha world. Naruto arrives and has to figure out how to stop this chaos. He might teach Inuyasha some of his ninja skills, and Inuyasha in turn could show Naruto how to deal with the demons. They could also find that the Juubi has some ancient connection to a powerful artifact in the Inuyasha world, and they have to stop an evil force from using this connection for their own gain.
One possible plot could be that Naruto and his team are on a mission in a strange new land and accidentally cross paths with Inuyasha and his group. They initially mistake each other for enemies but then realize they are both fighting against various forms of evil. They could then team up to defeat a powerful demon that neither group could handle alone.
In a 'naruto son of bellatrix fanfiction', perhaps Naruto has some of Bellatrix's wild and unpredictable nature. He could be on a journey to discover his true identity and how he came to be Bellatrix's son. This might lead him to explore the secrets of the wizarding world and his own ninja abilities in a new light.
Well, one possibility could be that Naruto inherits some of Gilgamesh's arrogance along with his power. Maybe he has a special ability to summon ancient Babylonian weapons. And he could use this in his battles in the Naruto world, like against the Akatsuki.
One possible plot could be that Naruto discovers his true heritage as the son of a princess from a hidden kingdom. He then has to deal with the politics and expectations of the royal family while still maintaining his ninja ways. Maybe he has to protect the kingdom from a new threat using his ninja skills.
In such a fanfiction, perhaps Naruto could be shunned by the village from the start. His 'devil' heritage might give him strange powers that he has to hide. He could struggle with self - identity, different from the Naruto in the original who is seen as a hero. Maybe he has to fight against the prejudice of the people who believe the devil's son can only bring destruction.