Well, one interesting concept could be the combination of the Assassin's Creed stealth and combat mechanics with RWBY's unique fighting styles. For example, characters might use Assassin's Creed's parkour abilities to navigate the RWBY world in really cool ways. Another concept could be the idea of the Assassins and Templars being involved in the RWBY story's overarching conflict, perhaps having different goals regarding the Dust or the Grimm. And also, the use of the Animus in the RWBY setting could lead to some really interesting plotlines, like exploring the memories of past characters from either universe.
One cool concept in 'Assassin's Creed RWBY fanfiction' is the blending of the two worlds' mythologies. The Assassin's Creed series has a rich history involving the Pieces of Eden and ancient civilizations. RWBY has its own lore about the Four Maidens and the origin of the Grimm. Merging these mythologies could lead to some epic storylines. Maybe the Pieces of Eden have some connection to the power of the Four Maidens, or perhaps they can be used to control the Grimm in some way. This kind of concept can open up a whole new world of possibilities for the fanfiction.
One interesting concept could be the combination of Assassin's Creed's stealth and parkour elements with RWBY's unique combat styles. For example, a character might use Assassin's Creed - like hidden blades in RWBY battles. Another concept could be the exploration of different kingdoms in RWBY through the eyes of an Assassin's Creed - style protagonist, uncovering secrets and mysteries. Also, the idea of an Assassin's Creed character getting involved in the Grimm - fighting in RWBY's world is quite fascinating.
One interesting concept could be ninjas using the Assassin's Creed parkour skills. They would be able to move through the Hidden Villages in a really cool and acrobatic way, much like how assassins move through cities in the game. Another concept could be the idea of the Sharingan being related to the Eagle Vision in Assassin's Creed. It could give the Naruto characters an enhanced perception of their surroundings and the ability to detect enemies or hidden paths more easily.
One interesting concept could be the combination of magic from Harry Potter and the stealthy combat skills from Assassin's Creed. For example, a wizard using the invisibility cloak in a way similar to how an assassin uses stealth. It could also involve characters from both universes teaming up to face a common threat, like a dark wizard who has also become involved with the Templars in Assassin's Creed. Another concept might be the use of Hogwarts as a kind of Assassin stronghold, with students learning both magic and assassin - like skills.
One interesting crossover could be the characters from RWBY using the Assassin's Creed parkour skills. Ruby, with her speed, could be an amazing assassin, running across rooftops in Vale like an Assassin. Another could be the introduction of the Pieces of Eden into the RWBY world, causing chaos as different factions fight over their power.
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.
Ruby would likely be enthusiastic. The Assassin's Creed fanfiction might remind her of her own quests in Remnant. She'd be eager to share her thoughts on the different assassins and their abilities. Weiss would look at it from an academic perspective, perhaps commenting on the use of language and the overall structure of the story. Blake may draw connections between the hidden blades of the assassins and her own weapon. Yang would enjoy the more intense fight scenes and might even wish she could participate in those battles.
Ruby Rose is often a popular character in such fanfictions. Her natural leadership and combat skills from RWBY can be combined with Assassin's Creed elements in interesting ways. Another one could be Ezio Auditore if he's somehow brought into the RWBY universe. His charm and assassin abilities would make for some exciting storylines. Also, Blake Belladonna, with her stealthy nature in RWBY, can easily be paired with Assassin's Creed - style stealth concepts.
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 interesting Assassin's Creed fanfiction could be about an assassin in a modern - day city trying to uncover a secret Templar plot that involves big corporations. They use their skills in stealth and combat to gather evidence while also dealing with normal life problems.
One interesting 'Assassin's Creed Fanfiction' story could be about an assassin who discovers a long - lost artifact that has the power to change the course of history in the Assassin's Creed universe. Another might be a story where an assassin has to team up with a templar to fight a common, greater evil. There are also fanfictions that explore the backstories of minor characters in the game, giving them more depth and significance.