One interesting storyline could be the cub character learning unique ninja skills from the wolf. Maybe the cub has a special connection to the wolf that allows for rapid skill development. For example, the wolf could teach the cub stealth techniques that are different from what the regular ninja academy offers.
A third storyline could be about the cub's origin. The wolf might be the only one who knows the truth about the cub's past, perhaps related to a long - lost ninja clan. As the cub discovers more about their heritage with the wolf's guidance, they also uncover secrets that could change the Naruto world as they know it.
In these fanfictions, a great storyline could be about how Draco and Harry's past enmity affects their new life in the wolf pack. They could struggle with trust issues at first. However, as they participate in pack activities like hunting or defending their territory, they start to see each other in a new light. There might also be a sub - plot where they discover a hidden prophecy related to the wolf pack that only they can fulfill together, which forces them to put aside their differences.
One interesting storyline could be Dark Naruto using the Rinnegan to reshape the ninja world according to his own dark vision. He might start by taking over hidden villages one by one, using the powers of the Rinnegan like the ability to summon powerful creatures or manipulate gravity. Another could be his interaction with other powerful characters. For example, how he would deal with Sasuke, who has his own set of powers and goals. It could lead to epic battles and power struggles.
Another could be a time - travel scenario where Naruto goes back in time and meets Rikudou Sennin. They then team up to prevent a great evil from ever arising in the first place. This would allow for a lot of character development and exploration of the Naruto universe's history.
One interesting storyline could be Naruto using the Sharingan to enhance his combat skills in a new and unexpected way. For example, he might combine his Rasengan with Sharingan - powered genjutsu to create a more powerful and deceptive attack.
One possible storyline is a cross - over where the ninjas in Naruto are exposed to the equivalent exchange principle of alchemy. They might start using it in their training, like instead of just relying on chakra, they think about what they are giving up to gain a new skill. For instance, a ninja might give up some of his speed to gain more strength. In the case of the Fullmetal Alchemist characters in the Naruto world, they could be involved in the battles between the villages. Alphonse could use his armor body to protect the villagers from attacks. And Scar from Fullmetal Alchemist could have an interesting interaction with the shinobi, as his unique form of alchemy might be seen as a very different type of jutsu.
One interesting storyline could be the combination of Naruto's ninjutsu with Final Fantasy 7's materia system. Imagine Naruto using materia - enhanced jutsus. Another could be Cloud and Naruto teaming up to fight a common enemy like Sephiroth and Madara combined. It would be epic to see their different fighting styles blend.
One possible interesting storyline could be a female Naruto ending up in the Bleach universe and learning about the different spiritual powers there. She might try to adapt her ninja skills to the new environment filled with Hollows and Soul Reapers. Another could be a Bleach character getting transported to the Naruto world and being amazed by the chakra system. For example, Ichigo might be curious about how chakra is different from his reiatsu.
Another could be a story where she teams up with some of the victims of Slenderman. She uses her insider knowledge of his ways to help them fight back. This would create a really cool dynamic of an 'enemy' becoming an ally. In these fanfics, often the sister has her own unique powers that can be explored in such a plot. For example, she might be able to see the future and uses this ability to predict Slenderman's moves.
A plot where Danzo fakes his death and teams up with Naruto undercover to take down a hidden threat to the village. They have to keep their alliance a secret from everyone, including the other village leaders. This creates a lot of tension and secrecy in the story.
Eventually, the cub will grow and become more independent, but the bond with the wolf will remain strong. They might even develop a telepathic connection or a special jutsu that only they can perform together, which is a testament to their deep - rooted relationship developed over the course of the fanfic.