Another plot idea is the family's reaction to Naruto's jinchuriki status. In the original, Naruto was mostly alone in dealing with it. But with his family alive, they could support him. His mother, Kushina, could share her own experiences of being a jinchuriki, and together they could find new ways to control the Nine - Tails' power.
Maybe the story could revolve around how Naruto's family being alive affects the political situation in the Hidden Leaf. His father, as a former Hokage, might have different ideas on how to handle relations with other villages. This could lead to new alliances or conflicts, all while Naruto is growing up in a more complete family environment.
One idea could be Naruto traveling to different dimensions where he meets alternate versions of female characters and they all form a sort of harem around him. Another could be that after a powerful jutsu, Naruto is transported to a realm where the rules of life and death are different, and he has to deal with female characters who have their own motives regarding his presence in this new world.
You could also write about Naruto's family during a time of peace. How they interact with the other families in the village, and how they pass on the values of the ninja way to the next generation. It could include family outings, training sessions that are more about bonding than combat, and the family's role in maintaining the positive atmosphere in the village.
Maybe a plot where Naruko comes from a different village and she and Naruto have to deal with the cultural differences in their family. For example, how they raise their children with different values from two different places. They might face some opposition from their respective villages at first, but they work through it for the sake of their family.
One idea could be exploring how Naruto and Sasuke's families interact in a modern AU. Maybe they are neighbors and their kids become friends, leading to some comical and heartwarming situations as the two dads, Naruto and Sasuke, try to deal with their kids' adventures.
One idea could be that Naruto discovers his family has been keeping a dark secret from him all along. Maybe they were involved in some sort of betrayal in the ninja world that affected many lives. Naruto then decides to take revenge by exposing their actions to the village. He could start by gathering evidence secretly, like old mission reports or testimonies from other ninjas who might know something.
One idea could be exploring the relationship between Naruto and the fox family in more depth. For example, how they interact on a daily basis, their traditions, and how Naruto adapts to being part of this unique family. Another could be a story where the fox family has to protect Naruto from an unknown threat, showing their loyalty and strength. Maybe also a plot where Naruto discovers a long - lost secret within the fox family that could change the entire shinobi world.
One idea could be exploring Kushina's life before Naruto was born in more detail. Maybe show her training as a jinchuriki and how she met Minato. Another could be a story where Naruto discovers a hidden journal of Kushina's that reveals family secrets and advice for him.
Perhaps in this fanfiction, Naruto and Konan's families are brought together because of a mysterious illness that only their combined family lineages can cure. They have to search for ancient remedies and along the way, they learn about each other's family histories and traditions. Their kids could play a crucial role in finding the cure, using their own budding skills and the bond between the two families.
A really interesting plot for 'kakashi and naruto family fanfiction' could be that Kakashi accidentally stumbles upon a secret power within Naruto's family that has been dormant for generations. He then helps them unlock and control this power. Along the way, they form a stronger bond as a family. And as Kakashi is involved, he also rediscovers some of his own values and beliefs through this process.
Another plot could involve the Kyuubi having a more sentient and family - like relationship with Naruto's family. It could communicate with them in dreams and offer advice or warnings. For example, it might warn them about upcoming threats to the village that Naruto alone might not be able to handle. This would create a unique dynamic where the family has to work with the Kyuubi for the greater good.