Another plotline could be that Annabeth is in a dangerous place like a cursed island. Percy has to fight his way through various mythological creatures and traps to reach her. Along the way, he discovers new aspects of his own powers as he is driven by his love for Annabeth and his determination to save her.
One interesting plotline could be their struggle against the various monsters in Tartarus. For example, facing off against the giants or other terrifying creatures that lurk there. Another could be their search for a way out while dealing with the psychological toll of being in such a dark and desolate place.
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.
A popular plot in Percy Jackson Luke and Annabeth fanfiction is the idea of team - ups. For instance, Luke and Annabeth might have to team up for a dangerous quest, and during this time, they rekindle an old friendship or discover new feelings for each other. This can create a lot of tension, especially if Percy is also involved. There are also fanfictions that delve into the backstories of Luke and Annabeth's relationship before Percy came into the picture. It could show how they grew up together at the camp and the early seeds of their connection, which might be different from what was shown in the original books.
Well, a great plotline could be Percy and Annabeth trying to start a club in high school related to ancient Greek mythology. But they face opposition from the school administration who think it's too 'out there'. And then there's the whole thing about them having to balance their demigod duties with high school projects and exams. It adds a lot of drama and humor as they struggle to fit in and still be true to themselves.
In some fanfics, it could be a competition gone wrong. For example, a friendly sparring match between Percy and Artemis turns into a full - fledged fight due to some external interference like a magic spell or a cursed weapon. This could lead to a series of events where they have to put aside their differences and work together to solve the problem that caused the fight in the first place.
Obviously, Percy and Annabeth are the main characters. Percy is the one doing the fighting, using his demigod powers which include his ability to control water. Annabeth, on the other hand, is the one Percy is fighting for. She is known for her intelligence and strategic thinking in the original series, and in this fanfic, she is likely the motivation for Percy's actions.
One plotline could be Percy having flashbacks during a normal day at Camp Half - Blood. For example, while training new demigods, he suddenly remembers a particularly harrowing battle from the past. This could lead to him accidentally losing control of his powers a bit, scaring the newbies. Another could be Annabeth having nightmares about the time she was trapped in Tartarus. In the fanfiction, she might start avoiding places or activities that remind her of it, like going underground or exploring dark caves. And a third plotline could be them both trying to deal with their PTSD while on a new quest, where they have to rely on each other more than ever to overcome their mental struggles.
One possible plotline could be a darker version of their quests. For example, instead of simply fighting monsters to save the world, they might be forced to make morally ambiguous choices. Maybe they have to sacrifice some innocent bystanders to defeat a greater evil. Another could be a power struggle between them where their darker sides come out. Percy could be more power - hungry and Annabeth more calculating in a way that challenges their friendship.
Another plotline might involve Percy and Annabeth getting lost in an alternate dimension within the world of 'The Lightning Thief'. In this dimension, the rules of the gods are different. They have to figure out how to get back while also dealing with strange creatures and challenges that test their relationship and their understanding of the mythological world.
A really interesting plotline could be them going on a quest together as a couple. They'd have to rely on each other's strengths more than ever. Percy's water - related powers and Annabeth's strategic thinking would be put to the test. Along the way, they could discover new things about each other and their relationship could deepen.