One common plotline could be Percy trying to control and lead the werewolf packs. Since he's the God of Werewolves, he might have to deal with internal power struggles within the packs. Another plotline could be Percy facing off against other gods who are threatened by his new role and the power it gives him over a new group of creatures.
In most of the original Percy Jackson series, he is not the God of Werewolves. However, in fanfiction, authors have the creative freedom to re - imagine characters. So, it's possible for a fanfiction to make Percy Jackson the God of Werewolves, but it's not a part of the official lore.
Many fanfictions also have a plotline where Percy as the God of Tides has to deal with the consequences of his new power. He might accidentally cause a natural disaster due to his inexperience with his godly abilities. Then, he has to find a way to fix it while also facing the wrath of the other gods who are angry about the disruption he has caused.
One common plotline is Percy struggling to control his new powers as the God of Chaos. He might accidentally cause chaos in places he doesn't mean to.
In some fanfictions, Percy might be sent back in time to a period when the gods were more actively involved in battles. He then has to navigate the complex politics of the time, deal with the more primitive and violent versions of the gods, and use his modern - day knowledge and skills to change the outcome of some crucial battles. This could also lead to him changing the future in unexpected ways, creating a whole new set of challenges for him.
Some fanfictions might explore a plotline where Percy's new status as the God of the Unseen causes a rift between him and his friends. His friends may feel that he's becoming too different or powerful. He could then have to struggle to maintain his relationships while also dealing with the responsibilities of his new role. Additionally, there could be a plot where Percy discovers ancient prophecies related to the God of the Unseen and has to figure out how to fulfill them without sacrificing his own values.
Another plotline could involve the eldest god having a prophecy related to Percy. This prophecy could force Percy to make difficult choices between his loyalty to his friends and his newfound role in the eldest god's plans. For instance, he might have to sacrifice a chance to save a friend in order to fulfill a greater purpose for the world as dictated by the eldest god.
In many fanfictions, a common plotline involves Percy being framed for a crime he didn't commit. He then has to clear his name while also fighting off the real culprits, which are often powerful monsters or devious demigods. Another plotline could be that a new prophecy emerges that only Percy can fulfill, but it puts him in direct conflict with some of his closest friends. Also, there might be a plot where a group of demigods decide to break away from the traditional Camp Half - Blood and form their own community, and Percy has to decide whether to join them or not.
Another plotline could involve Percy making a deal with the God of Death. In this scenario, he has to fulfill certain tasks in exchange for something he desperately needs, like saving a friend's life. This would put him in a series of dangerous and morally challenging situations as he tries to complete the tasks without sacrificing his own values.
One common theme is Percy's relationship with the gods. For example, how he copes with their demands or how he forms alliances with certain gods. Another theme could be Percy's adventures in the godly realms, which are often full of danger and mystery.
One common plotline is Percy using his demigod powers in a secret agent - like mission. For example, he might use his ability to control water to infiltrate a secure location near a body of water. Another is Percy teaming up with other demigods as a secret agent squad to take on a new threat to the demigod world that has a more modern, espionage - like feel.