Deadpool could be a wild card in the Blood Prison. He might use his regenerative abilities to survive the harsh conditions. For example, he could take on the prison guards without much fear of getting seriously hurt. His unpredictable nature would also throw off the normal order in the prison.
Deadpool might find the Blood Prison's rules and the way of life there very strange compared to his own world. He could use his sense of humor to cope with it. And he could also introduce some new concepts to the Naruto characters, like his own unique weapons. His presence could also make Naruto question some of his own beliefs about justice and punishment as Deadpool doesn't really follow the same moral code.
Deadpool would likely be a very chaotic element in the Naruto world. In a fanfic, he might arrive through a portal that was opened accidentally. His combat style would be completely different from what the ninjas are used to. He doesn't really have a set of jutsu like the ninjas, but his acrobatic fighting and use of guns and swords would be a novelty. He could form an unlikely friendship with Naruto. Naruto would be intrigued by Deadpool's immortality and try to understand it, while Deadpool would be interested in Naruto's chakra and the whole concept of ninjutsu.
Naruto could also be a sort of mediator between the werewolves and other factions in the apocalypse. His ability to make friends and his strong sense of justice would allow him to try and bring different groups together. He could use his jutsu to help the werewolves in their battles, while also learning from their ways of survival and their connection to nature. This would create a story where Naruto is not just a fighter, but also a unifying force in a chaotic world.
Well, one possible plot could be that Deadpool somehow gets transported into the Naruto universe and ends up in the Blood Prison. Maybe he teams up with Naruto who is also trapped there. They could fight against the prison's corrupt system together and use Deadpool's crazy combat skills along with Naruto's ninjutsu.
Deadpool would be like a bolt from the blue in the Avengers' dynamic in fanfiction. He doesn't follow the normal superhero protocol. He might teach the Avengers to be less rigid in their thinking. His interactions with Hulk could be really interesting. Hulk might see him as either a nuisance or a kindred spirit in terms of being an out - of - control force. And his relationship with Vision would be unique as well, with Deadpool constantly trying to understand what it's like to be an android while making inappropriate jokes along the way.
The ninja skills of Naruto characters would be very useful in the Stargate Atlantis setting. Sasuke's Sharingan, for instance, could be used to quickly analyze new threats or understand the technology of the Ancients. Sakura's medical skills could be a great addition to the Atlantis medical facilities, especially when dealing with new types of injuries or diseases that they encounter on other planets. And Naruto's Rasengan could be a powerful weapon against the mechanical or alien threats in the Stargate Atlantis universe.
Dark Naruto could fit in as an outsider. He would be very different from the magical beings in the Winx Club. His combat skills and dark energy would make him stand out. He might be initially feared or distrusted by the fairies, but his unique abilities could also be a great asset when facing a powerful threat.
He would probably also bring his ninja values with him. In a world full of power - hungry devils and angels, Naruto's values of friendship, hard work, and protecting the weak could have a big impact. For example, he might try to reform some of the more villainous characters by showing them the value of these things. He could also form strong bonds with the main characters in Highschool DxD, like Issei, based on shared ideals of fighting for what's right.
Naruto would probably fit in by being his energetic self. His determination would make him a great camper.
He could fit in by being the new and mysterious student. His different powers and abilities would make him stand out. The girls in the harem would be curious about him.
In the Highschool DxD setting, Six Paths Naruto would be a very interesting addition. He could start by making friends with the more open - minded characters. His powers would allow him to participate in the various power struggles in the school. For instance, he could use his ability to fly (thanks to Six Paths powers) to his advantage in battles. Also, his experience with different types of opponents in the Naruto world would give him an edge in dealing with the complex relationships between the devils, angels, and fallen angels in the DxD school. He might also introduce some new fighting styles based on his ninja training.