Another theme could be Orochimaru's relationship with his former teammates, Jiraiya and Tsunade. Some fanfictions might delve into their past, how their friendship was formed and then broken, and what could potentially mend it. It gives a more human side to Orochimaru.
One interesting theme is Orochimaru's pursuit of immortality. Fanfictions often explore the deeper reasons behind his obsession and how it might have been different in different scenarios. For example, what if he found an alternative way to achieve immortality that didn't involve such dark methods.
The theme of Orochimaru's influence on other characters can also be quite interesting. For instance, how his actions and teachings affected Sasuke's development. Fanfictions can explore different paths Sasuke could have taken under Orochimaru's tutelage, not just the one shown in the original series.
One idea could be an Orochimaru crossover with the Harry Potter universe. Orochimaru could be a dark wizard from a far - off land who comes to Hogwarts seeking ancient magic. He might try to corrupt some of the students with his snake - like ways and thirst for power.
There might be a fanfiction where Sakura is sent on a mission to spy on Orochimaru. Along the way, she discovers that Orochimaru has some secrets that could potentially help the Hidden Leaf Village if he were to be redeemed. This leads to a complex relationship between them as she tries to balance her loyalty to the village and the new knowledge she has about Orochimaru.
Another idea for a fanfiction could be a time - travel story. Naruto somehow travels back in time and meets a younger Orochimaru. He tries to prevent Orochimaru from going down the dark path. This would involve Naruto using his knowledge of the future to influence Orochimaru's decisions and change the course of history in the Naruto universe.
Another fanfiction might focus on Orochimaru's early days. It could explore his relationship with his sensei, how he got interested in forbidden jutsu in the first place, and what events led him to become the villain we know. For example, perhaps he was once a curious student who was pushed too far in his thirst for knowledge.
A really cool plot might be that Orochimaru discovers a prophecy about Naruto being the key to a new era of ninjutsu. Instead of trying to take over Naruto's body, he decides to team up with Naruto. They go on a journey to find ancient scrolls that can unlock this new era. Along the way, they face many challenges and their relationship evolves from mistrust to a strange kind of friendship. Another plot could be that Orochimaru is resurrected after his death in a different form and has no memories of his past evil deeds. Naruto is the one who finds him and decides to help him start a new life, but they have to face the people who still remember Orochimaru's old self.
One common theme could be the exploration of Orochimaru's complex and often dark character in situations that deviate from the main canon. However, forced scenarios in fanfiction are not ethical in real - world terms and should be treated as fictional exploration. Another theme might be the power dynamics within the fan - created situations.
One interesting idea could be Orochimaru seeing Naruto as a unique specimen and instead of just trying to use him, he actually starts to respect Naruto's willpower. This could lead to a strange mentorship of sorts where Orochimaru teaches Naruto some of his more unorthodox jutsu in exchange for Naruto trying to help Orochimaru find a new path that doesn't involve so much darkness.
One interesting story could be about Naruto's journey of understanding Orochimaru's complex past. In this fanfiction, Naruto might start to see Orochimaru not just as a villain but as a troubled soul. It could show how their interactions change over time as Naruto tries to bring out the good in Orochimaru. This could involve Naruto using his own experiences of being an outcast at times to relate to Orochimaru.
One interesting Orochimaru fanfiction could be about his early days of exploring forbidden jutsu. It might show how he got drawn into the dark side of ninjutsu research. Maybe he had a mentor who initially guided him in the right direction but then something happened that led him astray.
One interesting plotline could be Orochimaru trying to use Naruto for a new experiment but Naruto ends up influencing Orochimaru instead. For example, Naruto's strong will and belief in friendship might start to make Orochimaru question his own dark path.