One idea could be a story where Edward's friends throw him a surprise birthday party. They decorate the alchemy lab with streamers and balloons. Alphonse secretly bakes a cake with the help of Winry. Everyone gathers around as Edward walks in, completely shocked and overjoyed at the sight.
A fanfiction could revolve around Edward reflecting on his past birthdays during his journey to find the Philosopher's Stone. He remembers the simple celebrations he had with his mother and Alphonse before everything changed. As his birthday arrives in the current time, he decides to honor those memories by spending the day doing things his mother used to do with them, like cooking a special meal and sharing stories with Alphonse.
Family is a great theme. Since he lost his mother and has had a complex relationship with his father, his birthday could be a time to explore his feelings about family. He could be visited by the spirits of his family members in a dream on his birthday, and they give him advice and love, which gives him new strength to face his future challenges.
Yes, there are likely fanfictions out there with such a concept. The worlds of Naruto and Fullmetal Alchemist, where Edward Elric comes from, are quite different, but that's what makes the idea of a crossover in fanfiction so interesting. Writers might explore how Naruto's ninja world and its unique powers could interact with Edward's alchemical abilities and the complex world of Amestris.
In this fanfiction, her role as an alchemist might be perceived differently. As a girl, she might face more discrimination in the male - dominated field of alchemy. This could lead to stories of her having to prove herself more often and in different ways than in the original story.
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.
Alphonse Elric is often present. He might play a role in helping Edward understand and use his new gamer - like abilities in relation to alchemy. For example, he could be the one who discovers a new aspect of Edward's powers.
Edward might meet his parents. Since he has the chance to go back in time, he could meet them when they were alive and perhaps learn more about alchemy from them, which could change his future actions.
Well, perhaps in the fanfiction, Edward's sacrifice causes a rift in the fabric of time. This rift then starts to distort reality, and it's up to his friends to figure out how to fix it. They have to journey through different time periods and face challenges that Edward had faced before. Or it could be that his sacrifice was misinterpreted by some, and they start to view alchemy as a dangerous art again, leading to a conflict between those who understand the true meaning of Edward's sacrifice and those who don't.
In fanfiction, the possibilities are nearly endless. Regarding Edward Elric becoming a homunculus, it could be a very interesting concept. If he were to become one, it would completely change his relationship with other characters. For example, his brother Alphonse might react in a very different way. Also, Edward's own view of himself and his abilities would be transformed. His struggle with his new form, if it were to happen, could be a central theme in the fanfiction. Maybe he would try to find a way to reverse the process, or perhaps he would embrace his new existence as a homunculus. It all depends on the creativity of the fanfiction author.
A crossover with the world of Attack on Titan could be interesting. Female Edward could use her alchemy to help in the fight against the Titans. Maybe she could create new weapons or defenses using her alchemical knowledge. And her relationship with the Survey Corps members would be a great source of character development.
A really interesting plot could be a time - travel scenario. Chimera Mustang and Edward Elric get sent back in time to a crucial point in the history of alchemy. They have to navigate this new - old world while also trying not to change history too much. This would be full of opportunities for them to interact with past versions of characters and maybe even prevent some future disasters.