One plot idea could be that the female Altair is on a quest to uncover a long - lost secret within the Assassin Brotherhood that has been hidden by the Templars. She has to use her wits and combat skills to outsmart the Templars and their agents. Another could be her journey to train a new generation of female assassins, facing resistance from the male - dominated Assassin order. She could also be involved in a mission to retrieve a powerful ancient artifact that has the potential to change the balance of power between the Assassins and the Templars.
The female Altair could be exploring an uncharted territory in search of a new Assassin stronghold. Along the way, she encounters different cultures and tribes, some friendly and some hostile. She has to learn their ways and use her Assassin training to adapt. There could be a love interest that she meets during her travels, a fellow adventurer or a local she helps. But she also has to be careful not to let her emotions cloud her judgment as she continues her mission for the Assassin Brotherhood.
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.
She would likely be highly skilled in combat, just like Altair from the original. She might be very agile, able to quickly scale buildings and move through crowded city streets unnoticed. Intellectually, she'd be sharp, able to analyze situations and come up with strategies on the fly. And she'd have a strong sense of justice, being committed to the Assassin's cause of fighting against the Templars' tyranny.
One possible plot could be that Ezio, in his quest for knowledge or to face a new threat, somehow discovers a way to travel through time and space to meet Altair. Maybe he needs Altair's wisdom on a particular mystery related to the Assassins' Creed that only the founder might know.
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.
You can try searching on fanfiction websites like Archive of Our Own (AO3) or FanFiction.net. These platforms usually have a wide range of fan - created content, including stories about Altair and Malik from Assassin's Creed.
One interesting element is the combination of different combat styles. Altair's assassin skills from Assassin's Creed and the unique fighting styles in RWBY can create really exciting battle scenes in the fanfic.
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.
One idea could be Naruto being transported to the world of Assassin's Creed Syndicate. He could use his ninja skills, like shadow clones, in the context of the Assassin's Creed world. For example, his clones could be used to distract the templars while he sneaks in to steal an important artifact.
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.