One alternate storyline could be that Naruto is taken in by someone unexpected, like a group of outcast ninjas. They teach him different values and skills, leading to a Naruto who has a more unorthodox approach to being a ninja. Another could be that Naruto, in his search for answers about why Kushina abandoned him, discovers a dark secret about his family that changes his entire perspective on the ninja world.
Well, a common theme in Naruto Gets Abandoned Fanfiction is Naruto's mental and emotional growth. He has to deal with the trauma of being abandoned, which can lead to him developing a more complex and resilient personality. Another theme is his relationship with nature. Maybe he finds solace in nature since he has no one else. And then there's the theme of Naruto creating his own identity. Without the influence of those who abandoned him, he can define himself in a new and unique way.
Iruka could be a surprising character to abandon Naruto in some fanfictions. Maybe he gets influenced by some outside force or a misunderstanding that makes him think Naruto is no longer the Naruto he knew. And then there are the other genin in Naruto's class. They might abandon him out of jealousy if Naruto starts showing extraordinary powers too quickly. Or they could be pressured by their families who don't want them associated with Naruto.
In such a fanfiction scenario, Naruto's character development would likely be deeply affected. He would probably grow up with a stronger sense of self - doubt and a more desperate need for acceptance. Without Kushina's love and support, he might be more withdrawn initially. However, this could also fuel his determination to prove himself even more, making him strive harder to become a great ninja.
Perhaps it could be a new character created specifically for the fanfiction. A young ninja from a minor clan who showed extraordinary talent in a unique form of jutsu. But because their clan was small and not very influential, and the larger clans felt threatened by this new talent, they managed to get the village to abandon this prodigy.
Another reason might be that they faced some sort of writer's block. Coming up with new plot ideas, especially for a crossover as complex as Naruto and Devil May Cry, can be really challenging. They might have hit a point where they didn't know how to progress the story further. Or perhaps they received some negative feedback early on that discouraged them from continuing.
Perhaps it was a weapon created by a rogue ninja with unique powers. And for some reason, it found its way to Naruto in Wave. It might also be a weapon that was enchanted by a sorcerer long ago and has special abilities that Naruto will discover as he uses it.
One possible scenario in this fanfiction could be that Naruto's sister constantly interferes in his ninja training. She might think the training is too dangerous for him and tries to stop him from taking on challenging missions. For example, when Naruto is about to go on a mission to the Land of Waves, his sister could try to convince the Hokage not to send him, believing that he's not ready yet. This would add a whole new layer of conflict to the story, not just between Naruto and his sister, but also with the village's expectations of Naruto as a ninja.
A fanfiction about Naruto getting the Kusanagi could also involve a time - travel aspect. Naruto could be sent back in time and end up in the era when the Kusanagi was first created. There, he meets the original wielder and learns from them. He then brings the knowledge and the sword back to his own time, using it to defeat a great evil that was previously unbeatable.