In a 'naruto joins obito fanfic', it could start with Naruto being transported to a parallel dimension where Obito has already started his own ninja village. Naruto, seeing the potential in Obito's ideas but also the flaws, decides to join him. He helps Obito to correct his path. For example, Naruto could teach the ninjas in Obito's village about the importance of hope and not giving in to hatred. They could then work together to build a village that is a model for the rest of the ninja world, based on both Obito's and Naruto's ideals.
The main antagonist could be Madara. Even though Obito was once following Madara's plan, with Naruto joining Obito, Madara might see this as a threat to his grand scheme. He could try to manipulate events to drive a wedge between Naruto and Obito or directly attack them to stop their new alliance from achieving their goals.
One common theme is redemption. Obito has a dark past, and in these fics, Naruto often helps him find redemption through their relationship. Another theme is the power of love, showing how their bond can overcome the differences between them.
Naruto's fighting style would likely become more stealth - oriented. Since Obito is known for his ability to move undetected, he might teach Naruto some techniques to blend into the shadows and surprise his opponents. For example, Naruto could learn to use the environment to his advantage in a more subtle way, rather than his usual straightforward attacks.
Naruto could be one of his allies. Naruto has this knack for seeing the good in people and would probably be willing to give Obito a chance to redeem himself. Also, Sakura, with her skills as a medic - ninja, could be an ally. She might help heal Obito if he was injured during the war and see the potential in him to be a force for good.
One popular 'Obito x Naruto yaoi fanfic' is 'The Bond Beyond Time'. It delves deep into their relationship, exploring how they might come to understand each other on a different level. The story has some really emotional moments that make it engaging.
Another plot twist could be that Obito is secretly training Naruto to fight against an even greater enemy that no one else is aware of yet. This enemy could be an ancient force that is about to awaken, and Obito believes Naruto is the only one who can stop it. So, he's training Naruto in unique and unorthodox ways that seem strange to others at first.
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.