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.
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.
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.
There's also a fan fiction called 'Balder's Redemption'. In this story, Balder is in a difficult situation and Hercules comes to his aid. It delves deep into their personalities and how they learn from each other. It shows Balder's journey towards redemption with Hercules as his guide. The detailed descriptions of the mythical settings make it a great read.
Hercules is a figure from Greek mythology, so he is fiction in the sense that he is a part of mythology rather than a historical person. However, his stories have had a great impact on art, literature, and culture throughout history.
Well, they could be reimagined as siblings. This would completely change the dynamic. They could look out for each other, and Hercules might be overprotective of Meg. They could have family - centered adventures, like trying to protect their family from the wrath of a jealous god.
Another aspect could be their adventures together. Maybe they team up to face a new threat that wasn't in the original story. For example, they could go on a quest to find a lost artifact that has the power to change the balance between the mortal world and the world of the gods. This would focus on their skills and how they complement each other during the adventure.