In many fanfictions, the scenario of Naruto and Itachi killing the Uchiha clan is a very interesting but also controversial topic. One aspect could be the change in Naruto's character. Usually, Naruto stands for justice and protecting others. If he were involved in such a massacre, it would be a huge deviation from his original character. Maybe in the fanfiction, there could be some extreme situations that force him to do so, like being mind - controlled or having some false information.
One interesting idea could be how the themes of sacrifice from Itachi's story in Naruto might be translated into the RWBY universe. For example, Itachi sacrificed his reputation and relationships for the greater good of his village. In RWBY, a character might have to make a similar choice between personal relationships and the safety of the kingdoms. Another aspect could be the combat styles. If Itachi were to exist in the RWBY world, how would his Sharingan abilities blend with the Dust - based combat? It could lead to some really creative fight scenes. Also, the concept of family loyalty, which is strong in Itachi's story, could be explored in relation to the families in RWBY like the Rose or the Schnee families.
In some fanfictions, a possible motivation for Naruto could be to prevent a greater evil. Maybe he was tricked into believing that the Uchiha clan was about to start a war that would destroy the entire ninja world. So, he thought that by taking part in killing the clan, he could save more lives in the long run.
One way to integrate it is by using the concept of the Grimm. Maybe the reason for the 'Massacre' in the RWBY version is related to the Grimm. For instance, the new group inspired by the Uchiha might have some sort of connection to the Grimm that others don't understand. This connection could be misconstrued as a threat, leading to the decision to eliminate them. In terms of world - building, it would introduce a new aspect of how the RWBY world views different powers and relationships with the Grimm. It could also affect how characters interact with this new group, whether out of fear or a desire to understand.
If Naruto saved the Uchiha clan, the story of the Hidden Leaf Village would be rewritten. The history of the Uchiha's massacre would no longer be a dark stain on the village's past. The Uchiha would contribute their unique skills and abilities to the village's development. For example, their Sharingan abilities could be used for better security or in battles against common enemies. There would also be a change in the relationships between characters. People who were once enemies of the Uchiha might have to learn to work with them.
One idea could be a story where Itachi and Kushina meet in a parallel universe. In this universe, the events of the original Naruto storyline are altered, and they end up on the same side, fighting against a new common enemy. Their unique abilities, Itachi's Sharingan and Kushina's powerful chakra, would make for an interesting combination in battles.
Let's imagine Itachi Uchiha in love with a fellow Uchiha. They grew up together, trained together. Their love was based on a deep understanding of each other's pain and power. But when the Uchiha clan's fate was at stake, Itachi had to make difficult choices. His love for her was strong, but his loyalty to the village made him do things that seemed to shatter their relationship. In the end, his love remained in his heart, a hidden and painful memory.
Itachi Uchiha was a complex and tragic character. He was a prodigy in the Uchiha clan. He killed his entire clan except for his younger brother Sasuke, which was a shocking act. But in fact, he did this under orders from the Hidden Leaf Village elders to prevent a coup by the Uchiha clan that would have led to civil war. He lived as a double agent, making himself seem like a villain in Sasuke's eyes so that Sasuke would grow strong enough to kill him and be hailed as a hero, thus protecting the village and Sasuke at the same time.
Sure. There are often crossovers in fanfiction. Writers like to combine different beloved fictional characters. For the 'Harry Potter is Itachi Uchiha' idea, it could be really interesting. For example, Itachi's Sharingan abilities could be compared or integrated with magic in the Harry Potter universe. It might be a bit of a stretch in terms of the two very different settings, but that's the beauty of fanfiction. You can find such fanfictions on websites like Archive of Our Own or FanFiction.net if they exist.
Itachi Uchiha's full story is one of great sacrifice and hidden motives. As a member of the Uchiha clan, he was aware of the growing unrest within the clan against the Hidden Leaf. Instead of allowing a full - blown civil war, he made the difficult choice to kill his clan mates. His actions were misjudged by many, especially Sasuke. Itachi's time in the Akatsuki was also full of intrigue. He constantly had to balance his true loyalty to the Leaf with his role in the criminal organization. And all along, his love for Sasuke was his driving force, even if it seemed like he was cruel to him at times. He wanted Sasuke to become strong enough to take revenge on him and in doing so, free himself from the cycle of hatred.