Hades and Poseidon Brothers Fanfiction: What Are Some Plot Ideas?

One plot idea could be a story where Poseidon and Hades have to team up to save the underworld from a powerful and ancient threat that is endangering both the sea and the realm of the dead. They start off distrusting each other due to their different natures but gradually learn to respect and rely on one another.

Their relationship can be portrayed as a complex one. They are brothers, so there is an underlying bond of family. However, they also rule very different realms. For example, Hades might be jealous of Poseidon's more 'visible' and vast realm of the sea. At the same time, Poseidon could be envious of Hades' power over life and death in a way. But they also rely on each other in some ways, like when there are threats that could affect both their domains.

Well, it could focus on the political implications. In Greek mythology, the gods often have power struggles. Their marriage could be a strategic move. Poseidon and Hades might join forces to gain more influence among the other gods. Maybe Zeus would be threatened by their union. This could lead to a series of events where they have to prove their loyalty to each other and their new combined rule while facing opposition from Zeus and his allies.

A fanfiction could be about a competition among Zeus, Poseidon and Hades, and Percy has to be the judge. The competition could be something like who can best help a small, struggling mortal town without using their full power. This would show a different side of the gods and also test Percy's ability to be fair and objective.

One possible plot could be Percy struggling with the duality of his parentage. He might face discrimination from both the children of Hades and Poseidon. For example, the children of Poseidon could see him as a threat because of his connection to Hades, and vice versa. He could then go on a journey to prove that his dual heritage doesn't define him, but rather gives him unique powers to protect the world of the gods and mortals.

One plot idea could be that the OC is a young mermaid who accidentally crosses into Poseidon's territory. Poseidon, initially angry, is intrigued by her courage. Another could be the OC is a mortal with a special power to control water to a small extent, and Poseidon takes an interest in mentoring the OC. Or perhaps the OC is a demigod sent on a quest by the gods, and Poseidon has to decide whether to help or hinder the OC.

One plot idea could be Percy having to go on a quest specifically guided by Poseidon's hidden messages in the sea currents. He has to decipher these messages to find a lost artifact that can save the underwater kingdom from a new, mysterious threat.

Perhaps in a fanfiction, there could be a magical curse that causes Athena to become pregnant by Poseidon. This could lead to a power struggle among the gods as they fear the implications of a child born from such a union. The story could then focus on how Poseidon and Athena try to protect their unborn child from the scheming of other deities. They might have to seek help from unlikely allies and face numerous challenges along the way.

One idea could be exploring Persephone's adjustment to the Underworld. For example, she could start a garden in the gloomy realm using her powers over plants, which not only changes the look of the Underworld but also the attitude of its inhabitants. Another plot could be Hades trying to court Persephone in a more modern way, like taking her on a tour of different parts of the Underworld that are beautiful in their own dark way.

One idea could be exploring the backstories of the minor characters in the House of Hades more deeply. For example, delving into the history of some of the shades that are often just in the background.