In some Naruto Uzumaki clan harem fanfiction, a plotline could be that Naruto, due to his Uzumaki heritage, is prophesied to have a harem that will change the ninja world. So, different ninja clans try to either stop this from happening or use it to their advantage. The Uzumaki clan's reputation for strong chakra and unique abilities would play a big role here. His harem members would also have their own motives and backstories related to this prophecy, which could create a complex web of relationships and storylines.
One interesting plotline could be Naruto discovering his Uzumaki heritage in a more in - depth way within the harem context. Maybe he finds ancient Uzumaki scrolls that not only enhance his powers but also make him more attractive to the female characters in the harem. Another could be Naruto having to protect his harem members from enemies who target him because of his Uzumaki clan connection. This could lead to some intense battle scenes and character development for both Naruto and his harem.
One interesting plotline could be the discovery of long - lost Uzumaki clan techniques during the wars. These techniques might give Naruto an edge in battle and also help in uniting the remaining Uzumaki clan members.
One interesting plotline could be the discovery of long - lost Uzumaki clan jutsu. The protagonist might find ancient scrolls that contain powerful techniques that were thought to be lost with the decline of the clan. This could give them an edge in battles and also help in the revival of the Uzumaki's reputation.
Another plotline could be centered around a powerful Naruto clan member who, due to some magical or special ability, ends up attracting a harem. Maybe they have a unique chakra that has an alluring effect. The story could then explore how they manage these relationships while also dealing with the threats to their clan.
Perhaps a plot where Naruto, being of Uzumaki descent himself, has to help the female members of the Uzumaki harem unlock their latent powers. This could involve training sessions that also double as opportunities for romantic development. Or, a plot where the Uzumaki harem has to work together with Naruto to uncover a long - lost Uzumaki clan secret that could change the fate of the ninja world.
A possible plotline could be that Naruto and Hinata have a child who shows extraordinary abilities related to the Uzumaki clan. This leads to them having to protect the child from those who would want to use the child's power for evil. They seek the help of old friends and allies to keep their family safe.
In some fanfiction, there could be a story where the Uzumaki clan's connection to the tailed beasts is explored further. Maybe a young Uzumaki discovers a hidden history about how their clan was involved in the creation or taming of the tailed beasts, and this knowledge gives them an edge in dealing with the current political and power struggles in the ninja world.
One interesting Uzumaki fanfiction could be about an Uzumaki character who discovers a long - lost clan technique. This technique might give them unique powers, like the ability to control water in a different way than normal ninjas. They could use this new power to protect the village from a new, powerful enemy.
There are fanfics that center around the Uzumaki clan's origin. Some might describe how they came to be so powerful in sealing. A really good one could be a story where the Uzumaki clan members who survived the destruction of their village, other than Naruto's mother, come back and help Naruto understand his heritage better. They could teach him things that even Jiraiya didn't know about the Uzumaki.
Another plotline could be that Naruto discovers he has a connection to an ancient and powerful clan that was thought to be extinct. This new connection could bring him new allies, new jutsu, and a whole new set of challenges as he tries to balance his loyalty to Konoha with his newfound heritage.
One interesting plotline could be the main character using their prior knowledge to quickly master jutsu that Naruto struggled with in the original story. For example, they might be able to perform the Rasengan much earlier and with more finesse, which would change the way early battles play out in the Naruto universe.