A great plot could be a time - travel fanfiction. An Akatsuki member travels back in time and meets the Otsutsuki in their prime. They have to figure out a way to survive and also try to prevent the Otsutsuki from doing something that would have a huge impact on the future of the ninja world. Or perhaps a story where an Otsutsuki and an Akatsuki member form an unlikely alliance to take down a common enemy, like a more powerful and evil Otsutsuki who wants to destroy everything.
There could be a plot where an Akatsuki member discovers they have Otsutsuki blood. This causes a stir within the Akatsuki as they wonder if this member will turn on them. Meanwhile, the member is conflicted between their loyalty to the Akatsuki and their new - found heritage. They could also be hunted by other Otsutsuki who see them as a threat or a valuable asset.
One idea could be a story where an Otsutsuki member infiltrates the Akatsuki. They could have their own secret motives that conflict with the Akatsuki's goals, like using the Akatsuki as a tool to gather more chakra for their own clan's needs. Another plot could be about a young Naruto being mentored by an Otsutsuki in secret, and how this affects his relationship with the Akatsuki later on. Maybe he tries to persuade them to change their ways using the knowledge he got from the Otsutsuki.
One idea could be a story where a young ninja discovers they have a hidden Otsutsuki bloodline power that gives them the ability to control gravity. This power sets them apart from their peers and makes them a target for both those who want to use their power and those who fear it.
One idea could be a crossover where Naruto's Otsutsuki powers somehow connect with the supernatural elements in DxD. For example, his ability to absorb and use chakra could be related to the magic in DxD. Maybe he could use his Otsutsuki powers to enhance the abilities of the devils or angels he meets in the DxD world.
Well, a plot could be Naruto is on a mission to infiltrate the Akatsuki, but he starts to understand their motives which are not entirely evil in some aspects. For example, some members might have joined because they were persecuted by their own villages. Naruto could then try to find a middle ground between the Akatsuki and Konoha, to create a sort of peace deal. This would be a really different take on the Naruto - Akatsuki relationship compared to the original story.
One idea could be Naruto joining the Akatsuki but secretly working to reform it from within. He could try to change the views of members like Hidan and Kakuzu by showing them a different way of life. Another plot could involve Naruto being sent on a mission by the Akatsuki that makes him question his loyalty to the group. For example, if the mission is to harm innocent people, Naruto would have to find a way to complete the mission without actually causing harm.
One interesting idea could be exploring the unique powers that the otsutsuki clan brings into the Naruto universe. For example, how their god - like abilities might change the power dynamics among the existing ninja clans. Another idea could be the relationships between Naruto and otsutsuki characters. Maybe Naruto has to learn from them to gain new skills for protecting his village.
Maybe a fanfiction where Kaguya is reborn in a different form and Naruto is the only one who can sense her true identity. They form an unlikely alliance to fight a new common enemy that threatens both the ninja world and the secrets Kaguya holds.
One idea could be Naruto joining the Akatsuki for a secret mission to infiltrate a greater evil organization. He has to hide his true intentions from the Akatsuki members while also trying to understand their motives better.
One plot idea could be Hinata getting caught in the middle of a conflict between Naruto and the Akatsuki. Maybe she tries to use her Byakugan to spy on the Akatsuki for Naruto but gets discovered. This could lead to a tense situation where Naruto has to rescue her.
One idea could be that some members of the Akatsuki start to question their mission after getting to know Naruto better. For example, Itachi might secretly help Naruto in his fight against the Akatsuki while still pretending to be on their side. This would add a lot of mystery and tension to the story.
A possible plot for Naruto Akatsuki Family Fanfiction is the Akatsuki members raising a child together. This child could be a powerful being that they found or created. They would have to teach the child their ways, and in the process, the Akatsuki members might change themselves. For instance, Hidan might become more patient while teaching the child about their beliefs, and Kakuzu might learn to be more giving when it comes to providing for the child's needs.