One common theme is power. Since Naruto has his own set of powers and Percy Jackson has his demigod abilities, when combined with the idea of a primordial god, power dynamics are often explored.
Well, you can try looking on fanfiction.net. There are often some interesting crossovers in that genre. Just search for the relevant tags like 'Naruto', 'Primordial God', and 'Percy Jackson' and you might find some great reads.
Well, it could be that Naruto, with his ninja skills, enters the world of Percy Jackson. Maybe he teams up with Percy to fight some common enemies like the Titans or other mythological creatures. Naruto's jutsus would be a cool addition to the battles in the Percy Jackson universe.
Poseidon is a likely candidate. Since he is Percy's father in the original series, it would make sense for him to take a more active role in raising Percy. He could teach Percy all about the ocean, its secrets, and how to use his water - related powers more effectively.
I'm not sure if it's extremely popular. It might not be as well - known as some mainstream 'Percy Jackson' fanfics. One reason could be that the concept of being 'born a primordial' is quite a niche and complex idea within the 'Percy Jackson' universe, which might not appeal to a very wide audience. Also, there could be other fanfics that focus more on the well - established characters and storylines from the original books, rather than this rather unique and perhaps less explored concept.
Maybe some of the more malevolent Greek gods could be antagonists. If Naruto's presence disrupts the balance of power among the gods, some of the jealous or power - hungry ones could try to get rid of him. For example, Hades might see Naruto as a threat to his domain and try to stop him from interfering in the affairs of the underworld.
Well, perhaps the plot could involve Percy having some sort of special powers right from birth due to being a primordial. He might have an instant connection to the most ancient and powerful forces in the 'Percy Jackson' universe. Maybe he has to deal with other deities or creatures being both in awe and afraid of him. And he could be on a journey to understand his true nature as a primordial, which is completely different from his normal demigod identity in the original stories.
His character might become more aloof. As a primordial god, he would be far removed from the normal world of demigods. He'd likely have a different perspective on things like friendship and loyalty. For example, he might not be as quick to jump into a fight for his friends as he used to be, because his new status would bring a different set of responsibilities.
Percy might struggle with his new identity. He has been a demigod for so long, and suddenly becoming a primordial god means he has to re - evaluate his place in the world. He may miss his old life, his friends, and the simplicity of being a demigod. Adjusting to the new powers and responsibilities is not going to be easy.
In Percy Jackson fanfic, the idea of Percy as a'sex god' might seem out of place considering his original character. Percy is typically portrayed as a heroic and somewhat goofy demigod. However, in fanfic, authors often take creative liberties. It could be a way to explore his attractiveness in a more exaggerated sense, perhaps in a romantic or comical context within the fan - created story.