A cool plot could be Edward getting involved in a political intrigue in this new world. Since he has a strong sense of justice from his own world, he might find himself in the middle of a power struggle between different factions. He could use his wits and knowledge from his home world to try and bring about a positive change in this new and unfamiliar political landscape.
Another plot might involve Edward meeting alternate versions of his friends and family from Fullmetal Alchemist in this other world. This could lead to some really emotional and thought - provoking moments as he has to come to terms with how different they are while still seeing the similarities. Maybe he meets an Alphonse who is not a suit of armor but a normal human, and they have to re - establish their bond.
One interesting plot could be Edward trying to adapt to a world where alchemy doesn't exist in the same way. He might have to learn new forms of magic or technology to get by. For example, he could struggle with not having his alchemy skills to help him in combat or solve problems at first, but then gradually discovers new powers within himself in this new world.
One interesting plot could be where Edward has to adjust to sudden fatherhood while still dealing with his alchemical pursuits. Maybe he discovers a new form of alchemy related to protecting his child.
Well, perhaps there's a plot where Edward, as a girl, has to keep his true identity a secret. This could lead to some really tense and comical situations. Like when his friends from before start showing different kinds of interest in him, not knowing it's really Edward. And he has to figure out how to interact with them without giving away his secret while also trying to find a way to turn back into his original self.
One more great plot could be Naruto being trained by Edward in alchemy. Edward is a brilliant alchemist despite his young age. Naruto, with his eagerness to learn new things, would soak up all the knowledge. He could start creating his own alchemical ninja tools. For example, he could make a kunai that can transmute into different forms depending on the situation. And as he gets better at alchemy, he might start to question his own ninja way. Is it really all that different from alchemy? This internal struggle could add a lot of depth to the fanfiction.
Winry Rockbell is often paired with Edward. Their relationship from the original series can be further explored in the alternate world setting. Maybe in this new world, they have different challenges in their relationship, like different social statuses or new enemies that target their relationship.
One interesting story could be where Edward uses his alchemy skills in a unique way related to milk. Maybe he discovers a new alchemical property of milk that helps him in his quest. For example, it could be a story where he uses milk to create a special potion that gives him temporary enhanced strength.
One interesting fanfiction could be about Edward and Hohenheim going on a journey together to uncover a long - lost alchemical secret. They might face various challenges along the way and bond over their shared knowledge of alchemy.
One interesting fanfiction could be where Naruto and Edward Elric team up to fight a common enemy that has elements from both their worlds, like a chimera made of shadow clones and alchemy - based creatures. They'd use Naruto's ninja skills and Edward's alchemy in unique combinations.
One idea could be a crossover where Edward and Urahara meet in a world that combines their respective universes. They could exchange knowledge about alchemy and spiritual powers. For example, Edward could be intrigued by Urahara's zanpakuto and its unique abilities, while Urahara might be interested in the principles of alchemy.
There might be a fanfiction where Edward gets a concussion while in a fight with an enemy. This could lead to him having strange dreams or hallucinations that are related to his past traumas and his journey to find the Philosopher's Stone. The concussion could be a trigger for him to re - evaluate some of his decisions and his relationship with alchemy.
In some 'Edward Elric the Gamer' fanfiction, Edward may gain in - game abilities that affect his real - world interactions. Maybe he gets a 'detect magic' ability in the game which then helps him sense alchemical energy in his world, leading to all sorts of new adventures and challenges.