One idea could be that Naruto, with his ninja skills, gets transported to the Assassin's Creed world. He teams up with the Assassins and in the process, attracts a harem of both ninja and Assassin women. They are drawn to his unique abilities and his unwavering determination.
One idea could be that Naruto, with his ninja skills, somehow gets transported into the Assassin's Creed Rogue world. He might mistake the Assassins for some new type of ninja clan. He could then use his unique jutsu, like the Shadow Clone Jutsu, in battles against the Templars. For example, he creates a horde of clones to distract the enemy while he sneaks up on them like an Assassin.
A possible plot could involve an Assassin from Assassin's Creed Origins finding a way into the Naruto world. He discovers the chakra system and tries to incorporate it into his assassin skills. Naruto and his friends become intrigued by this strange visitor and his different fighting style. They team up to stop a group of rogue ninjas who are trying to steal ancient artifacts from both worlds.
One idea could be that Naruto, with his ninja skills, gets transported to the Assassin's Creed world. He might mistake the Assassins for a new type of ninja. He could then start learning their ways, like using the hidden blade in combination with his own jutsu. Another plot could involve Naruto teaming up with an Assassin to take down a powerful enemy that is causing chaos in both the Naruto universe and the Assassin's Creed universe.
A really interesting plot would be if the Akatsuki from Naruto were somehow related to the Templars in Assassin's Creed. Maybe they share a common goal, or there's a power struggle between them. Or, imagine a scenario where Sasuke becomes an assassin. He already has the skills and the brooding personality. He could use his Sharingan to enhance his assassin abilities, like predicting enemy moves better.
Another interesting concept could be a fusion of the Hidden Leaf Village and an Assassin's Creed Brotherhood. The ninjas could adopt some of the assassin's stealth and parkour abilities, and together they could fight a common enemy that threatens both their worlds.
A great plot idea for Assassin's Creed Civil War fanfiction could be to focus on the role of civilians during the war. For example, an Assassin could be protecting a group of escaped slaves who are being hunted by both Confederate soldiers and Templars. The Assassin has to use their skills not only to fight off the pursuers but also to guide the slaves to safety. This could involve exploring the Underground Railroad within the context of the Assassin - Templar conflict. Also, the fanfiction could delve into how the war is affecting the economy and how the Assassins and Templars are trying to manipulate it for their own ends. Maybe an Assassin discovers that the Templars are hoarding supplies meant for the Union army, and has to stop them.
A great Assassin's Creed crossover fanfiction idea is to cross it with 'Game of Thrones'. Picture an Assassin in Westeros, trying to navigate the complex web of political intrigue and assassination plots that are already rife in that world. They could be hired by different houses to carry out assassinations or be on a mission to uncover some dark secrets. Another interesting one could be a crossover with 'Cyberpunk 2077'. An Assassin in a high - tech future world, using their traditional skills along with new - age technology to take out targets in the neon - lit streets of Night City.
One idea could be creating an OC who is a descendant of a lesser - known historical figure involved in the Assassin - Templar conflict. For example, an OC descended from a local resistance leader during a particular era. Another idea is to have an OC with a unique skill set, like being able to communicate with animals which gives them an edge in stealth missions. Or an OC who is a double agent, initially thought to be a Templar but is actually an Assassin with a very complex backstory.
How about a crossover with the Star Wars galaxy? The Assassins could find themselves in a far - off planet in the Star Wars universe. They might get involved in the fight between the Jedi and the Sith, using their stealth and combat skills in a whole new environment filled with blasters, lightsabers and strange alien species.
A more character - driven plot could be about the relationship between Kassandra or Alexios and their family members. You could write a fanfic that delves deeper into their feelings towards their mother, father, or siblings. What if there was a secret that their family was hiding from them all along? This could add a whole new layer of drama and mystery to the story.