Another plotline could involve them facing a common enemy that is specifically targeting their unique brotherly bond. Maybe a powerful sorcerer who wants to break their connection because he fears the combined strength of their powers. They would then have to fight not just for themselves but also for their relationship.
One interesting plotline could be Calypso and Leo's adventures together after leaving the island. They might encounter new monsters and have to use their combined skills to survive. Another could be a love triangle situation involving Percy, Calypso, and Leo which adds drama and tension to the story.
One possible plotline could be that Leo and Percy are in a dangerous situation together, like being trapped in a magical maze. In the heat of the moment, with all the adrenaline and the realization of how much they mean to each other, they share a kiss. It could be a turning point in their relationship, making them realize their deeper feelings.
Another plotline could be centered around a family secret that only they can uncover. This secret might be related to a special Pokémon or a hidden power. As they search for the truth, they also strengthen their brotherly relationship, facing various challenges along the way, like rival trainers who are also after the same secret.
Another plotline could involve family drama. Maybe there are secrets in their family history that they uncover as brothers. This could lead to conflicts with other family members or even enemies from their family's past. They would have to rely on each other to face these challenges.
Maybe in the fanfiction, there's a plotline where the characters from Naruto are in a war - like situation and they form a 'band of brothers' - style unit. Naruto could be the inspiring leader, Sasuke the brooding but powerful second - in - command, and they lead a group of their friends. They have to make tough decisions, sacrifice for one another, and ultimately prove that their bond is stronger than any obstacle.
There could also be a plotline where they both struggle with the idea of being brothers. At first, they might be in denial, but as time goes on, they realize that they can be there for each other. For instance, Dudley could help Harry deal with the pressures of the wizarding world by providing a different perspective, and Harry could introduce Dudley to a world of wonder and magic.
One possible plotline could be Percy's struggle with his new godly powers and how it affects his relationships. For example, his friends might be in awe or a bit intimidated by his new status.
One possible plotline could be Percy having to adjust to the unique rules and traditions of the hunters. For example, dealing with their vow of celibacy in a humorous or challenging way. Another could be Percy going on a special hunt with the hunters that involves a mythical creature not commonly associated with them.
One possible plotline could be their adventures in a new, undiscovered part of the mythological world. Maybe they stumble upon a hidden realm full of ancient and powerful creatures that they have to either befriend or fight.
Well, perhaps in this 'percy is an orphan fanfiction', there's a plotline where Percy is constantly bullied because he's an orphan. But then he discovers a hidden power within himself that not only helps him stand up to the bullies but also starts to unravel a mystery related to his family. Maybe he finds out that his parents were part of a secret organization and their disappearance was not accidental.