In a Naruto - Dragon Ball Z crossover, Goku could be a great character to cross with Obito. Goku's pure - hearted nature and his super - strong combat abilities would contrast and interact interestingly with Obito's more complex and often - conflicted character.
A crossover with the My Hero Academia universe might see Obito paired with All Might. All Might's symbol of hope and his powerful quirk could have a profound impact on Obito, who has a rather dark past. Their interactions could lead to Obito either finding a new path or causing more chaos depending on how the story unfolds.
Superman could be paired with Obito in a crossover. Superman's pure - heartedness and incredible powers could influence Obito. They could work together to protect a city under threat. Obito might be in awe of Superman's abilities at first but then find ways to contribute with his ninja techniques.
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.
Naruto would be a great character to pair with Obito in crossover fanfiction. Their relationship in the original Naruto series was complex. In a crossover, they could have new adventures together, perhaps exploring different dimensions or facing new threats that require both of their unique abilities.
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.
Superman from the DC universe. Superman stands for truth, justice, and the American way, but his methods are often more lenient compared to Akainu. The two could have a philosophical debate about justice while also having to fight a common enemy.
Luffy from 'One Piece' would also be an interesting crossover character. Imagine Ichigo being abandoned on an island in the 'One Piece' world. Luffy's carefree yet determined nature could contrast with Ichigo's more brooding personality. They could embark on a journey together, with Ichigo learning about the concept of the 'One Piece' and using his powers in unexpected ways within this new world.
Kakashi from Naruto himself could be part of a 'grey' themed crossover within the Naruto universe. Maybe a situation where Kakashi's past and his more mysterious side are explored further, and Naruto has to work with him in a darker, more complex mission that delves into the grey areas of the ninja world.
Alice from Alice in Wonderland could also be an interesting choice. Her curious nature would lead her to explore the world of Young Dracula. And Young Dracula might be both amused and a bit annoyed by her constant questions and her fearless attitude in the face of his vampiric self.
Piccolo could be an interesting crossover character. He could be from a world where lemons have some sort of magical or spiritual significance. His relationship with Gohan in the original story would add depth to their interactions in this crossover. For example, Piccolo might be initially skeptical of the lemon - related things but eventually see their value when it comes to helping Gohan.
Solid Snake from the Metal Gear series would be a great choice. His stealth skills and military expertise would contrast with Travis Touchdown's more brash and direct fighting style. They could be forced to work together on a mission, and learn from each other's ways of combat.