Obito's influence would likely make Naruto more aware of the darker side of the ninja world. Naruto is usually very optimistic, but with Obito's guidance, he would see the hardships and betrayals that can happen. For example, Naruto might become more cautious in his trust of others.
Besides Obito, Sasuke could be a main character in this fanfiction. Sasuke, with his own journey of redemption and his understanding of power and the ninja world, could have an interesting dynamic with the reincarnated Obito. Also, Sakura might play a role. She could be the one who tries to heal the reincarnated Obito, both physically if he is injured during his new adventures and emotionally from the traumas of his past life.
A major theme is the power of forgiveness. Naruto is all about forgiving others, and when it comes to Obito, this theme is often explored. How can Naruto forgive Obito for all the harm he has caused? Also, the theme of changing one's fate. Obito's fate seems set in the original story, but in fanfics, he often tries to change it with Naruto's influence. There are also themes related to the understanding of different ideologies as Naruto and Obito have very different outlooks at times.
In some fanfictions, it might be so. Fanfiction allows for creative and often out - of - canon interpretations. However, in the original Naruto series, Naruto has no relation to Obito in this way.
In fanfiction, the combination of Naruto, Temari and Obito can lead to some really interesting storylines. For example, they could be on a joint mission where their different skills and personalities clash and then gradually come to work well together. Naruto's determination, Temari's no - nonsense attitude and Obito's complex past could create a lot of drama and character development.
In some fanfictions, Naruto might hate Obito because of Obito's actions in the main Naruto storyline. Obito was involved in many heinous acts like causing the Nine - Tails attack on Konoha which led to the death of many, including Naruto's parents. This could be a reason for Naruto's hatred in fan - made stories.
In fanfiction, Naruto sacrificing himself for Obito could be a very emotional and dramatic concept. It might show Naruto's ultimate selflessness, believing that Obito is worth saving at the cost of his own life. This could be due to Naruto seeing the good in Obito that others might not, like the part of Obito that was once a kind - hearted shinobi.
A great Naruto Obito fanfiction could explore his relationship with Rin in more depth. Maybe it's a story where Obito has a chance to save Rin from dying, and how that would change his path. It could also show how his relationship with Naruto might be different as a result.
In this fanfiction, Obito's development can be quite interesting. He may begin with his own motives that are not entirely pure. However, as he spends more time with Naruto, he starts to see the world through Naruto's eyes. This could lead to him becoming more empathetic towards others in the ninja world. For example, he might start to understand the importance of protecting the village and its people, just like Naruto does.
One possible reason could be that Obito sees Naruto as a means to fulfill his own twisted ideals. Maybe he wants to shape Naruto into a weapon against the Hidden Leaf. Another reason might be that he feels some sort of connection to Naruto because of their shared experiences of being alone and ostracized in the past. He could also think that by taking Naruto as a baby, he can prevent Naruto from becoming the hero the village wants him to be, thus disrupting the balance in the ninja world.