In a 'naruto x fullmetal alchemist fanfiction', there could be a scenario where the Truth from Fullmetal Alchemist is somehow connected to the Sage of Six Paths in Naruto. This could lead to some really deep and philosophical storylines. Maybe characters from Naruto have to face the same kind of consequences as those in Fullmetal Alchemist when they try to use power they don't fully understand. For instance, if Sakura tries to use alchemy without proper knowledge, she could end up losing something precious, just like the Elric brothers did. And the different settings of the two worlds, like Konoha and Central City, could be merged in an interesting way.
One idea could be a crossover where Naruto's chakra system somehow gets intertwined with Alchemy. For example, Naruto could learn to transmute his chakra into different elements in a more alchemical way rather than just using ninjutsu. Another could be that characters from both universes meet in a strange in - between dimension. Maybe Sasuke and Edward Elric could have an intense battle or a deep conversation about their quests for power and revenge. And perhaps Hinata could learn some alchemical self - defense techniques from Winry Rockbell.
Another idea might be alternative endings. Fanfiction often plays with the concept of 'what if' things had gone differently. Maybe if Edward had not been able to regain his brother's body, how would he have coped and what new path would his life take?
One idea could be exploring Lust's backstory before she became a Homunculus. Maybe she had a human life before and what led to her transformation. Another could be a fanfiction where Lust forms an unlikely alliance with a human alchemist. They could work together to achieve a common goal, like saving a town from a greater evil.
One idea could be an OC who is a foreign alchemist with a unique form of alchemy based on their homeland's culture. For example, an alchemist from a desert region who uses sand-based alchemy. Another could be an OC that has a special connection to the Homunculi, not as an enemy but as someone trying to understand and redeem them. Maybe an OC that was experimented on by the same people who created the Homunculi and has some shared traits.
One idea could be a story where Ed and Al find a way to reverse their alchemical mistakes in a completely unexpected way. Maybe they encounter a long - lost alchemist who has a unique method. Another plot could be them traveling to a parallel universe where their roles are reversed. For example, Al is the one who is more assertive and Ed is more reserved.
There probably are. Fanfiction writers often love to mash up different universes. In such a fanfic, Naruto could bring his chakra - based powers and blend them with the principles of alchemy from Fullmetal Alchemist. Maybe he'd use his Rasengan in a new way by incorporating alchemical transmutation circles. It would be a wild and creative concept.
The OC could be an undercover agent sent to spy on Roy Mustang. However, as she gets to know him better, she realizes that he's not the power - hungry military man she was led to believe. Roy, on the other hand, discovers her true identity but instead of turning her in, he tries to convince her to join his side. This back - and - forth dynamic can lead to a very engaging fanfiction with a romantic subplot.
One plot idea could be that they discover a way to reverse their alchemical transformations through a series of adventures together as a married couple. They might travel to different parts of their world, facing old enemies who now have new motives against them as a united front. Another idea is that they start a school for alchemy, passing on their knowledge while also dealing with the politics of the alchemy world.
One idea could be the alchemist using gamer skills to unlock new alchemical formulas faster. For example, they might complete certain quests in a virtual - like world within the fanfiction to gain knowledge of rare alchemical combinations.
One idea could be a crossover where Harry Potter characters end up in the world of Fullmetal Alchemist. For example, Harry could use his magic in Amestris and face the challenges there. Another could be a story where the alchemy principles are somehow introduced into the Hogwarts curriculum. And a third idea might be a fanfic where a character from Fullmetal Alchemist attends Hogwarts and has to adapt to the magical world.
One idea could be that Naruto characters somehow end up in the world of Fullmetal Alchemist. Maybe Naruto and Sasuke are chasing after a rogue ninja who uses some strange alchemy - like jutsu to open a portal to the other world. There, they have to learn about alchemy to find their way back home and in the process, they meet the Elric brothers and team up to fight against common enemies, like homunculi who are interested in the power of chakra.