A possible plot is that a powerful enemy creates a situation where Naruto and Obito's minds are swapped. Naruto, in Obito's body, has to deal with the Uchiha's powers and the baggage that comes with Obito's past. Meanwhile, Obito in Naruto's body has to figure out how to use the Nine - Tails' chakra and also has to face the villagers who have a different perception of 'Naruto'. This would create a lot of humorous and also deeply emotional moments.
Another plot could involve Obito being reborn in Naruto's world at a different time. He has no memory of his past life initially. Naruto meets him and they become friends. As Obito starts to regain his memories, he has to decide whether to continue on the path of his previous self or to embrace the new relationships he has formed with Naruto and the others. It could lead to a great internal struggle within Obito.
One idea could be a crossover with the Naruto and Bleach universes. Obito could end up in the Soul Society and get involved in the conflicts there. Maybe he teams up with Ichigo to fight a common enemy.
One idea could be an Obito crossover with the DC Universe. Picture Obito using his Sharingan abilities in Gotham City. Maybe he teams up with Batman to fight a common enemy like the League of Shadows. His teleportation jutsu could add a new dimension to their combat strategies.
One interesting plot could be Naruto, now in Obito's body, trying to prevent the Uchiha massacre. He could use his knowledge from his past life to change the course of events and save his friends in the Uchiha clan. Another idea might be Naruto exploring Obito's relationship with Rin in a new way, bringing his own sense of loyalty and friendship to the dynamic.
One idea could be a story where Naruto somehow travels back in time and meets a younger Obito. He tries to change Obito's path before he turns to the dark side. This could involve Naruto showing Obito the true meaning of friendship and the value of the Hidden Leaf village.
One idea could be that Female Obito is a hidden shinobi from a forgotten clan. She teams up with Naruto to uncover a conspiracy within the Hidden Leaf. Their journey involves facing off against rogue ninjas who are trying to steal an ancient artifact that could change the balance of power in the ninja world.
One idea could be that fem Naruto and Obito are from different clans but are forced to work together on a mission. They start off disliking each other due to their clans' past rivalries. But as they face challenges during the mission, they gradually come to understand and respect one another. Another plot could be that in a different universe, fem Naruto has the power to see Obito's past and tries to change his fate. She becomes his friend and tries to guide him away from the dark path he took in the original story.
One idea could be a story where Obito's mask holds a hidden power. For example, it could be a key to an ancient jutsu that was sealed away long ago. Another plot could involve a character trying to steal the mask for its significance in the ninja world.
One idea could be that the reborn character tries to prevent Obito's fall to the dark side. They could use their knowledge of the future to stop Madara from manipulating him. For example, they might intervene during the battle where Obito was thought to be dead and expose Madara's true intentions early on.
One interesting plot idea could be a crossover where Naruto's senjutsu abilities are combined with another universe's magic system. For example, if he were to cross over into the Harry Potter universe, he could use senjutsu to enhance his magic or even teach the wizards about chakra. Another idea is a crossover with the Dragon Ball universe, where Naruto's senjutsu clashes with the ki energy of the Saiyans. Maybe he has to use senjutsu to face off against a powerful Saiyan who has come to the Naruto world. Or a crossover with the Bleach universe, and Naruto uses senjutsu to interact with the spiritual energy there, perhaps even helping Ichigo in a battle against a powerful Hollow by using his unique senjutsu skills.
One plot idea could be that Naruto characters end up in Ikebukuro. For example, Naruto himself could be searching for a new type of ninja tool that he heard can only be found in Ikebukuro. Meanwhile, the gangs in Durarara start to notice this strange, orange - clad boy with strange powers. Another idea is a character swap where some of the Durarara characters gain ninja abilities and get involved in Naruto - style battles in their own world. Maybe Celty could use her shadow powers in a more ninja - like way, like stealth and quick attacks.