Another plotline could be a more psychological exploration. Orochimaru has always been a bit of an enigma, and his love for Naruto could be a way to explore his own humanity. Maybe he has a change of heart because of Naruto and starts to question his past actions. This could lead to a journey of self - discovery for Orochimaru, while Naruto is left to figure out how to deal with this new side of his old enemy.
A possible plotline could be Orochimaru's redemption. He realizes the error of his ways and joins Naruto in protecting the ninja world. He could use his vast knowledge of jutsu and forbidden arts to help Naruto against new threats.
Another plotline could be that Orochimaru is forced to train Naruto. Maybe the Hidden Leaf Village has some sort of leverage over Orochimaru. During the training, Naruto discovers some dark secrets about Orochimaru's past and his experiments. This knowledge could help Naruto in his future battles not just against Orochimaru if he turns on him, but also against other enemies who might have similar ideas. Naruto might also gain some new physical abilities from Orochimaru's training, like enhanced speed or strength.
Yes, there are quite a few. You can start by looking on popular fanfiction websites like Fanfiction.net or Archive of Our Own. Some might explore Orochimaru's complex relationship with Naruto in unique ways, such as Orochimaru seeing Naruto as a key to some kind of power, but then developing an unexpected emotional bond.
Perhaps in the fanfiction, Naruto loves the moon because it reminds him of someone he lost. The moon could be a symbol of peace and unity for him, similar to his dreams for the ninja world. He could then strive to protect the moon from any threats, believing that if the moon is in danger, it's a sign that the world's peace is also at risk.
One possible plotline could be Naruto slowly realizing his feelings for Ino as they go on missions together. He might start noticing little things about her, like her determination and beauty. Another could be that Ino is initially in love with someone else, but Naruto's unwavering love and loyalty gradually win her over.
Perhaps the female Naruto joins Orochimaru because she wants to learn more about the secrets of the ninja world that she believes Orochimaru can unlock. She may be curious about the darker aspects of ninjutsu that are not taught in the normal ninja academies. But then she discovers that Orochimaru is using her for his own immoral experiments. She then teams up with some of Orochimaru's former followers who also want to break away and they plot to take him down from the inside.
Well, perhaps Naruto and Sasuke are forced to join Orochimaru. Maybe Orochimaru has some kind of leverage over Konoha that makes them comply. In this fanfiction, they could start to learn unique jutsus from Orochimaru but also have to constantly resist his more evil intentions. They might also meet some interesting characters within Orochimaru's lair.
One possible plotline could be Fem Indra being a time - traveler and changing the course of Naruto's story. For example, she could prevent some of the major tragedies that occurred in the original Naruto storyline.
One possible plotline could be that Kale somehow ends up in the Naruto world and Naruto has to help her adapt. They could then form a bond and fight together against common enemies.
One possible plotline could be Naruto being captured by Orochimaru and forced to endure various genetic experiments. Maybe Orochimaru is trying to extract the power of the Nine - Tails from Naruto in a more invasive way. Another could be that Naruto's friends, like Sasuke and Sakura, attempt a daring rescue mission while Naruto is in Orochimaru's clutches and they face off against Orochimaru's minions.