In this fanfiction, Percy could die because of a curse placed on him. Artemis, being a goddess, feels compelled to try and break the curse even though it's too late to save Percy. She travels to different realms in search of a way to reverse the curse, facing many challenges. Meanwhile, the demigod world is in chaos without Percy, and Artemis realizes that he was more important to the balance than she initially thought.
Maybe Percy sacrifices himself to save Artemis from a powerful and ancient evil. His death then haunts Artemis, and she decides to honor his sacrifice by taking on a mission that Percy always dreamed of but never got to complete. Along the way, she meets some of Percy's friends and they form an unlikely alliance to achieve the goal, all while Artemis is dealing with her own complex emotions regarding Percy's death.
One idea could be that after Percy's death, Artemis feels a strange sense of loss and responsibility. She starts to investigate the circumstances around his death more closely, which leads her to discover a hidden conspiracy that was targeting demigods. As she delves deeper, she also finds that Percy had left behind some sort of clue or power that she needs to figure out how to use in order to stop the conspiracy.
One plot idea could be Percy Jackson getting lost in the realm of Chaos and being found by Artemis. They then have to work together to find a way back to the normal world while facing strange creatures unique to Chaos. Another could be a story where Artemis is sent on a mission by Chaos and Percy joins her, and during the journey they discover a long - lost prophecy that involves both of them. Maybe a plot where Percy has a vision from Chaos about a threat to Artemis and he has to protect her while also dealing with his own internal struggles.
One idea could be that Percy and Artemis are sent back to the time of the Titans' rule. They have to work together secretly to gather allies among the minor gods and demigods who are oppressed. Another could be they go back to the founding of Camp Half - Blood and have to make sure the important events occur as they should while also dealing with a threat that could change the future of the camp. A third plot idea might be that they are thrown back to a time when a powerful artifact was first created, and they need to prevent it from falling into the wrong hands to safeguard the future of the demigod world.
A powerful Titan who has escaped from Tartarus. This Titan blames Percy for his previous imprisonment and wants to make Artemis suffer as well for her role in keeping the Titans locked away. He uses Percy's death as a way to manipulate the situation and turn the demigods against Artemis, or he might try to steal Percy's powers that were left behind after his death for his own evil purposes.
One idea could be that Percy is framed for stealing a powerful magical artifact. His friends initially doubt him, but as he tries to prove his innocence, he uncovers a conspiracy within the magical community. For example, a secret group wants to use the situation to gain more power and is setting him up as a scapegoat.
One idea could be Percy getting involved in the Kurukshetra war. He might use his water - controlling abilities to change the course of battles near rivers or lakes. For example, he could create huge tidal waves to disrupt enemy formations.
One idea could be a time - travel plot where Percy goes back in time and meets a younger, different Medusa before she was turned into a monster. Another could be a story where Medusa somehow gets a chance at redemption and Percy has to decide whether to trust her or not. Maybe a plot where they have to team up to defeat a greater evil that threatens both of them.
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.
One idea could be Percy using his devilish powers to protect his friends in a unique way. Maybe he has the power to manipulate shadows and uses this to create illusions to mislead enemies.
One idea could be Percy exploring his newfound godling powers and how they differ from his demigod abilities. He might accidentally cause some chaos in the mortal world while trying to master them.
One idea could be Percy helping a Naiad protect her water source from pollution. He uses his demigod powers to fight off the forces causing the pollution.