Since I don't know the exact story, it could potentially be about a figure who met a watery end and was considered beautiful in a way that defies normal expectations. It could be a story about love and loss, where the person who drowned was remembered in a special way that made them seem the most beautiful. It might also be a story with a moral or lesson, perhaps about the transience of life and the power of memory.
One possible theme could be the concept of beauty in death. The idea of the 'ahogado' (the drowned one) being the most beautiful might imply that there is a certain allure or significance to the state of death.
A great fan fiction idea could involve Hercules and Balder teaming up with other mythological characters. They could form an alliance to face an even greater enemy. Maybe they join forces with Athena and Thor to battle against a horde of demons that are trying to invade the realm of the gods.
One possible scenario in a Loki x Balder fanfiction could be their initial encounter. Maybe Loki, with his mischievous nature, tries to play a prank on Balder, but Balder's pure and kind heart makes Loki's attempt backfire in an unexpected way. This could lead to an interesting dynamic where Loki starts to see Balder in a new light.
Overcoming obstacles is a theme that can be seen frequently. There could be external factors like enemies or difficult situations in their world that they have to deal with. And in the process of overcoming these, their relationship blossoms. For example, if there are social or cultural barriers between them, the story could be about how they break through those barriers to be together.
One common theme is friendship. Since Hercules and Balder are both strong and heroic figures, their friendship is often explored. For example, how they support each other in difficult times.
One common theme is the exploration of their family ties. Since they are both part of the Norse pantheon, many fanfictions focus on how their brotherly relationship plays out. Another theme is the contrast between their personalities. Loki's cunning and Balder's goodness make for an interesting dynamic.
Start by imagining a scenario that hasn't been explored much in the original myths. For instance, what if Hercules and Balder were switched in their roles? Hercules in the Norse mythology world and Balder in the Greek one. Then build the story around how they would handle this new situation, what challenges they would face, and how they would overcome them. You can also add your own unique twists to the existing mythologies to make the fan fiction more interesting.