One interesting plot twist could be that Naruto actually has a hidden power that is the key to Hagoromo's own power development. Maybe Hagoromo has been struggling with something in his power growth, and Naruto's presence unlocks it. Another could be that Naruto is from the future, and his knowledge of future events causes a huge shift in the way things are supposed to happen in Hagoromo's time.
Well, imagine this. Naruto discovers that he was made Hagoromo's brother by a dark force as part of a long - term plan to corrupt Hagoromo. Naruto has to fight against his own nature and the bond he has with Hagoromo to save him. Or perhaps, Hagoromo thinks Naruto is his enemy at first because of some false information, and Naruto has to prove his true intentions. This would create a lot of drama and tension in the fanfiction.
A great plot twist would be if Naruto was sent to Hagoromo's time by an enemy. This enemy thought Naruto would disrupt Hagoromo's path to becoming a great sage, but instead, Naruto ends up being the one who helps Hagoromo in ways no one expected. Also, it could be a plot twist if Naruto turns out to be a reincarnation of someone important in Hagoromo's family that was thought to be lost forever.
Perhaps Hagoromo's brother was wrongly accused of something in the past and sealed away. Naruto discovers his existence and frees him. In return, the brother tells Naruto the true history of the ninja world, including secrets about the origin of chakra that no one else knows. This knowledge helps Naruto to bring about a new era of peace and understanding among all the ninja clans.
One interesting plot twist could be that Lucius tries to use Hermione as a spy within Dumbledore's Army. He might think that he can manipulate her into getting information for the Death Eaters. But Hermione, being as clever as she is, turns the tables on him and feeds him false information. Another twist could be that Hermione discovers a long - lost family secret that explains how she and Lucius are related and that this secret has the power to either redeem Lucius or completely destroy the Malfoy family name.
In such a fanfiction, Naruto might quickly master powerful jutsus. Hagoromo could teach him the secrets of chakra that no one else knows. Naruto would likely become extremely powerful, maybe even unlocking new forms of Sage Mode or a unique power related to Hagoromo's own abilities.
Their relationship could be one of rivalry. The brother might feel overshadowed by Hagoromo and see Naruto as a way to prove himself. So, he initially tries to use Naruto against Hagoromo's ideals but later realizes the error of his ways and becomes an ally to Naruto.
In some fanfictions, it might be possible for Naruto to be depicted as Hagoromo's brother, but this is completely a creative and non - canonical concept. Fanfiction allows for such wild and imaginative ideas to explore different relationships and storylines.
Well, in fanfiction, if Naruto is the brother of Hagoromo, it would have far - reaching implications. Firstly, Naruto's status would be elevated to an almost god - like level. His every action would be seen in the context of his relation to Hagoromo. His journey as a ninja would likely be different. He might not face as much opposition or might be expected to fulfill different prophecies. His relationship with Sasuke could also take on a new dimension. Maybe Sasuke would see Naruto in a different light, either as a more powerful rival or as someone who he needs to follow or support more. And in terms of the plot, the story could explore new conflicts, like those arising from Naruto's new - found status and how it affects the balance of power in the ninja world.
One interesting plot twist could be that Naruto's friends initially think he's been possessed by an evil force and try to stop him, but later find out that he's actually the key to saving the world from a greater, hidden threat related to Sauron's power. Another twist could be that the Akatsuki are somehow connected to Sauron's minions from Middle - earth, and Naruto has to team up with some unlikely allies to defeat them.
Another interesting twist is if it turns out that some of the powerful jutsu in the Naruto world are actually the result of an ancient experiment similar to the ones in Resident Evil. For example, the Sage of Six Paths was actually trying to create a powerful being by combining natural energy with a virus - like substance, which is similar to how the Resident Evil scientists create their monsters. This revelation could change how the Naruto characters view their own powers and history.
Well, a really interesting aspect could be how Naruto's presence as Madara's older brother changes the formation of the ninja clans. Maybe he could have united the Uchiha and Senju clans much earlier, preventing a lot of the bloodshed. Also, Naruto could have passed on his unique jutsu and values to Madara, which would have made Madara a very different character. This would completely change the power dynamics and relationships in the Naruto world. And then there's the idea of how their family history would be rewritten and how that would impact the whole ninja world's history.
One interesting plot twist could be when a Splatoon character suddenly gains Naruto - like powers. Imagine an Inkling being able to use the Rasengan. It completely changes the dynamic of the story.