The main antagonist could be an ancient demigod who was forgotten by history but has now awakened. This demigod could be bitter about being forgotten and decides to take revenge on the current demigod world. He might have some dark and powerful magic that he's been developing during his long slumber.
Maybe in the fanfiction, Percy stumbles upon a forgotten legend about a magical artifact that has the ability to rewrite the fates of demigods. The catch is that it's hidden in a realm that is slowly being consumed by chaos. Percy, along with his friends, must navigate this dangerous realm filled with strange creatures and illusions to find the artifact before it falls into the wrong hands. They'll also have to deal with the fact that the gods are not too keen on this artifact being found as it could disrupt their carefully crafted plans for the demigods.
It could be a demigod who was overshadowed by the more well - known ones like Percy. Maybe someone who was born to a minor god or goddess and got lost in the shuffle. For example, a demigod of a nature god who was always in the background while the big battles were fought by the children of the more prominent Olympians.
Well, it adds a new and exciting twist to the original story. Writers like to explore different scenarios, and the idea of Percy being forgotten creates a lot of opportunities for drama and new character development.
It could be an old demigod from a long - forgotten camp. Maybe someone who was exiled or lost during a great war in the past. For example, a demigod who had the power to control the weather but was shunned because people feared their power.
Percy Jackson is likely to still be one of the main characters. Since it's related to his world, he'd be in the center of the story. Alongside him, there could be new characters representing the forgotten primordial beings. They might be ancient and powerful, with names and abilities that are unique to this fanfiction realm.
I don't think it's overly popular. Fanfiction often focuses on more common themes like Percy's adventures, his relationships with other characters like Annabeth. The 'forgotten god' concept is quite different and might not appeal to the majority of Percy Jackson fans who are more interested in the established storylines and character dynamics.
It could be a demigod who was once shunned and now wants revenge. This demigod has turned to the dark side and uses their powers in a twisted way to cause chaos among the other demigods. They might target the forgotten demigod specifically because they see them as a symbol of all that is wrong with how demigods are treated.
A possible plotline could be that Percy is somehow cursed to be a forgotten god. He has to figure out who cursed him and why. In his quest, he may find that there are other forgotten gods and goddesses who are also trying to break free from the same fate. He could team up with them and use his unique skills as Percy Jackson, even in his forgotten state, to fight against the forces that are keeping them in obscurity. This could involve battles with powerful magical entities, exploration of long - lost realms, and the discovery of new powers within himself that are related to his new 'forgotten god' status.
In a 'Percy Jackson, Naruto, The Forgotten God' fanfiction, perhaps the forgotten god has some power that is crucial for both their worlds. Percy Jackson might come from his world where Greek gods exist and Naruto from his ninja - filled land. They are brought together by some prophecy. They start their journey, facing enemies from both their universes who don't want the forgotten god to be found. Along the way, they learn from each other's fighting styles and ways of life.