Well, a plot might involve Percy being drawn to New Orleans by a strange dream about a powerful artifact hidden there. Once he arrives, he finds that the local voodoo culture has some unexpected connections to his Greek heritage. He could then get caught up in a power struggle between different voodoo practitioners who want to use the artifact for their own ends, and Percy has to figure out how to stop them without disrupting the delicate balance of the magical world in New Orleans.
A great plot could be Percy arriving in New Orleans during Mardi Gras. Amid the chaos and celebration, he senses an otherworldly danger. It turns out that some dark forces are using the energy of the festivities to break through from the Underworld. Percy must then enlist the help of the local demigods, some of whom have unique powers influenced by the New Orleans environment, like the ability to control the swampy waters or communicate with the spirits of the bayou, to stop these forces.
One idea could be Percy discovers an ancient underwater temple in the Mississippi River near New Orleans that's related to a long - forgotten sea god. Another could be he teams up with local demigods in New Orleans to fight off a group of malevolent spirits that are causing chaos in the city. Maybe he also has to navigate the complex social hierarchies among the different magical beings in New Orleans while on a quest.
Well, perhaps Percy could be reborn into a different era in the 'Percy Jackson New Life' fanfiction. Like, he's born in ancient Rome during the height of the Roman Empire. He has to navigate this new world with his old memories intact, and deal with the differences between the Greek and Roman pantheons. He might also meet versions of his old friends in their Roman forms and form new alliances and rivalries.
One idea could be a quest where Percy and Artemis have to team up to rescue a group of demigods captured by a powerful new enemy. Maybe a Titan who has found a way to drain the powers of young demigods. Percy's skills in water manipulation and combat, combined with Artemis's archery and her connection to the moon, would make for an exciting adventure as they face various challenges along the way.
Perhaps Elena is sent to New Orleans by her friends to seek a cure for a new vampire - related ailment. Klaus, who still has an interest in Elena, offers his help but on his own terms. They end up in a power struggle within the vampire community of New Orleans. As they interact more, Elena starts to see a different side of Klaus, a side that is not just the cruel and power - hungry vampire she thought he was. This new perspective makes her question her own feelings towards him.
Well, a plot could involve Percy Jackson stumbling upon a hidden cave where cavemen are in a sort of stasis. When they wake up, they mistake Percy for a god because of his powers. Percy then has to teach them about the modern world while also learning about their primitive yet magical ways of life. Maybe there are ancient artifacts in the cave that are related to the Greek gods and Percy has to protect them from being misused.
One plot idea could be that Percy has to face Arachne in a battle of wits rather than just a physical fight. Maybe Arachne weaves illusions within her webs that Percy has to break through to reach her. Another could be a scenario where Arachne tries to use Percy to get revenge on the gods by tricking him into stealing an important artifact from Olympus. A third idea is that Percy and Arachne form an unlikely alliance when a greater threat emerges that endangers both of their existences.
A plot could involve Percy accidentally stumbling into Artemis' territory. At first, Artemis is angry but then realizes Percy has information about a threat to her hunters. So they start an adventure to stop this threat. During the journey, they learn more about each other's worlds and develop a mutual respect. Or maybe there's a spell that makes Artemis lose her powers temporarily and Percy has to protect her while she regains them.
A possible plot is Percy being sent on a mission by the gods to study a strange phenomenon in the ocean that is affecting both the mortal and demigod worlds. He uses his scientific skills, which he has developed over time, to analyze the situation. He might encounter sea monsters that are acting oddly due to this phenomenon and has to figure out how to stop it. Or perhaps Percy is recruited by a secret scientific organization within the demigod world that is trying to find a way to bridge the gap between the magic of the gods and modern - day mortal science. He could bring a unique perspective with his experiences as a demigod.
A really interesting plot could be that Cupid, for some reason, decides to make Percy the ultimate symbol of love in the demigod world. Percy is then thrust into a role he doesn't understand, having to deal with love - sick demigods coming to him for advice. Meanwhile, he has his own relationship problems, like his feelings for Annabeth being complicated by this new status. He has to figure out how to handle Cupid's meddling and restore some normalcy to the love lives of those around him.
One idea could be Percy having to adapt his demigod skills to his new situation in a wheelchair. For example, he might have to figure out new ways to fight monsters. Maybe he uses his wheelchair as a weapon somehow, like ramming into foes or using it to block attacks. Another plot could involve his friends helping him adjust, and together they discover new powers or artifacts that are specifically useful to him in his wheelchair - bound state.
One plot idea could be that Percy Jackson somehow ends up in the world of 'New Girl' and has to navigate the apartment - sharing and relationship drama while also hiding his demigod powers. For example, he might use his water - controlling abilities in a creative way to solve a plumbing problem in the loft, all while trying not to arouse suspicion.