Well, a unique plot could be that the Naruto descendant of Juubi discovers a hidden prophecy about themselves. This prophecy states that they are the key to either saving or destroying the ninja world. Along the way, they must face challenges from different ninja clans who either want to help or hinder them based on their own interpretations of the prophecy. Also, they could have special abilities that are a blend of Naruto's and the Juubi's powers, like being able to create clones with a fraction of the Juubi's power in each.
A really interesting plot for this fanfiction could be that the descendant of Juubi is actually born in a different dimension. This dimension has different rules regarding chakra and ninja abilities. When they somehow end up in the Naruto universe, they bring with them unique powers and knowledge from their own dimension. They might have an easier time controlling the Juubi's power because of how their own dimension works. But at the same time, they are a stranger in this new world and have to figure out how to fit in while also dealing with the fact that they are a descendant of the Juubi and are likely to be feared or hunted by some.
One idea could be that the descendant has to constantly hide their true nature from the villagers who fear the power of the Juubi. They might struggle to control the immense chakra within them and accidentally cause small disasters at first. Another plot could involve the descendant being hunted by an ancient organization that wants to use their connection to the Juubi for their own evil purposes.
A plot idea could be that the Juubi's power is accidentally unleashed in the Mass Effect galaxy, causing chaos. Mass Effect races have to figure out how to stop it with the help of Naruto characters who understand the Juubi better. Another idea is that a Mass Effect character travels to the Naruto universe and tries to bring back the knowledge of the Juubi's power to use against the Reapers.
In this fanfiction, perhaps Naruto has a pre - destined connection to the Juubi. It could be that in a past life he was related to the origin of the Juubi, and this connection starts to resurface during his adventures, leading to a whole new set of challenges and powers for him.
A unique plot could be a story where the protagonist has both the Rinnegan and Jiongu and is hunted by different ninja clans who want to either steal the powers or destroy the one who has them out of fear. This could lead to a journey of self - discovery as the character tries to understand and master these powers while on the run. Maybe they end up forming an alliance with some unlikely allies to fight against their pursuers.
A great plot could involve the Nine - Tailed Fox being related to a powerful Fairy Tail spirit. So, when Naruto enters the Fairy Tail world, he has to figure out how to control this new connection. Also, what if the Sharingan was actually a form of lost Fairy Tail magic? A young Fairy Tail wizard could discover this and try to learn more about it from the Naruto characters. This would create a really interesting dynamic as they try to understand each other's powers and cultures.
One plot idea could be that the Fem Juubi, in a more sentient form, initially sees Naruto as a threat due to his power. But as they interact, she discovers his kind heart. Maybe Naruto has to convince her to use her power for good instead of destruction. For example, he shows her the beauty of the ninja world and the bonds between people.
Another plot could be a story where Naruto is somehow lost in Moka's world. He has to adapt to the new rules and customs while also trying to find a way back home. Along the way, he befriends Moka and they learn from each other's strengths. For example, Naruto teaches Moka about the importance of friendship and loyalty in his ninja world, and Moka shows Naruto how to use his chakra in new and unexpected ways in her world.
One idea could be a male character who has a unique bond with the Juubi. Maybe he's able to communicate with it on a deeper level than others. He could use this connection to gain new powers and face off against powerful enemies in the Naruto universe. Another plot could involve the male character trying to tame the Juubi's wild nature and use its energy for good, like protecting the Hidden Villages from a new, greater threat.
One unique plot point could be Naruto having access to the combined powers of Juubi and Kaguya from the start. He might not have to struggle as much to gain power, but instead, learn to control these immense powers.
Well, perhaps in this fanfiction, the descendant of Dracula aspect is a hidden part of Naruto's family tree. An evil organization is trying to capture Naruto to use his Dracula powers for their own nefarious purposes. Naruto has to fight them off while also learning about his new - found abilities and the history of his Dracula ancestors. He might even meet other vampire - like characters along the way who can either help or hinder him.
One idea could be that Merlin becomes king in a parallel universe where magic is the norm and rulers are chosen based on their magical abilities. He has to deal with a different set of rules and expectations compared to the original series. Another plot could be that Merlin is magically transported to a far - off land where he is recognized as a king due to his powers. He has to learn about this new land and its people while also facing threats from those who oppose his rule.