In Assassin's Creed 3 fanfiction, you could write about a time - traveling adventure. Imagine Connor being sent to a future time, like the modern day, and seeing how the world has changed because of the actions of the Assassins and Templars throughout history. He could interact with modern - day Assassins and learn about new technologies and ways of combat. Another idea is to focus on the hidden secrets in the game. Maybe there are more ancient artifacts or prophecies that Connor discovers and has to protect from the Templars. And finally, a story about Connor's love interest and how it affects his duties as an Assassin would be interesting.
A great plot for Assassin's Creed 3 fanfiction could be an alternate ending. For example, what if Connor had managed to convince Haytham to join the Assassins? This would completely change the story's dynamic. Or, a story could be written about Connor's adventures in a different part of the world, like exploring Europe during the same time period. He could encounter new Assassins or Templars there and have to adapt his skills. Also, a fanfiction could center around the impact of Connor's actions on the future of the Assassin Brotherhood in America.
One idea could be a crossover with Pirates of the Caribbean. The Assassin could team up with Jack Sparrow to find a hidden treasure that is also related to an ancient Piece of Eden. They'd face challenges like sea monsters and rival pirates.
One interesting idea could be exploring the backstory of a minor character in the game. For example, you could write about the early days of a random assassin in training, their struggles, and how they overcame them. Another idea is to create an alternate universe where the Templars and Assassins have a different kind of relationship, like a truce that changes the whole dynamic of the story. Or you could focus on a specific historical event that was only briefly touched upon in the games and expand it from an Assassin's Creed perspective.
A great plot for an Assassin's Creed Black Flag fanfiction could be centered around the search for a hidden, powerful artifact that was lost at sea. Edward Kenway hears rumors about it and embarks on a journey to find it. Along the way, he has to face not only other pirates who are also after the artifact but also Templars who want to use it for their own evil purposes. This would involve a lot of sea battles, exploration of uncharted islands, and of course, some stealthy Assassin - like infiltrations of enemy strongholds.
One idea could be that a wizard discovers the Assassin's Creed and uses magic to enhance their assassin skills. For example, they could use a spell to make their hidden blade even more deadly. Another could be an Assassin being sent to the wizarding world on a mission and having to adapt to magic while still using their assassin training.
One idea could be exploring the backstory of Edward Kenway's early life before he became a pirate. Maybe his family life, what led him to choose the path of piracy initially.
Maybe an Assassin travels back to the time of the Roman Empire. They could interact with famous Assassins from that era and together face a new, time - traveling Templar threat that's trying to rewrite history for the Templars' benefit. This would involve a lot of action in the ancient Roman setting, with the Assassin having to blend in and also use their modern combat techniques sparingly so as not to arouse suspicion.
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.
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.
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 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.