Maybe because they are both popular in the world of fictional heroes. But that's a wrong idea. They are from different universes with different powers and story backgrounds.
Some people might think that because they both deal with characters who have extraordinary abilities. However, Percy Jackson is based on Greek mythology, and his powers come from being a demigod related to the Greek gods. Superman, on the other hand, is an alien with powers from a different origin. So it's a baseless assumption.
No. Percy Jackson is a series with its own unique mythology and storylines. It has no relation to being a Superman fanfiction.
Well, the plot could be centered around Percy's newfound ability to see through things like Superman. This could give him an edge in battles against the monsters that lurk in the shadows in the demigod world. He might also start to exhibit heat vision, which could be both a blessing and a curse. On one hand, it could be a powerful weapon against his foes, but on the other hand, he has to learn to control it so as not to harm his friends. The fanfiction could explore how he trains with the help of the demigod trainers and perhaps some of Superman's allies from his own world to master these new powers.
In such a fanfiction, Percy's angelic nature might give him abilities like enhanced healing or the power to communicate with other celestial beings. He could team up with Superman and use his unique skills, like his sword - fighting skills from the Percy Jackson series, along with his angel powers. Superman, on the other hand, would bring his super - strength and flight. They could face off against powerful enemies that threaten both the mortal world and the more fantastical elements of Percy's world.
Well, there might be some. You could try searching on fanfiction websites like Archive of Our Own. Sometimes, these crossovers can be really creative, but it might take some time to find the really great ones.
If someone thinks that, they probably haven't read the books carefully. The Percy Jackson series starts with a strong focus on Greek mythology. The characters, the monsters, and the overall world - building are all in line with Greek myths. While there is a connection to Roman mythology later on, it is a continuation and expansion of the original Greek - based story, not a Roman fanfiction.
One possible scenario could be that in the fanfiction, the sick person is a demigod who has been poisoned during a quest. Percy Jackson and Will Solace team up to find a cure. Percy uses his water - related powers to purify some of the ingredients needed for the antidote, while Will Solace, with his healing skills, tries to keep the sick demigod stable. They face various obstacles along the way, like monsters trying to stop them from reaching the final ingredient. In the end, they manage to save the sick demigod and strengthen their friendship.
The main antagonists could be the Titans. They are powerful enemies in the Percy Jackson universe already. Now that Percy has Superman - like powers, they might see him as an even greater threat to their plans of overthrowing the gods. So, they would do everything in their power to stop him.
It's likely a misunderstanding. Maybe someone who is not very familiar with both series made a wrong assumption. But as we know, Percy Jackson is about Greek mythology and demigods, while the Demogorgin is from Stranger Things, two very different things.
It's probably a misunderstanding. Maybe some people who are not familiar with the series just assume it could be Japanese fanfiction because of its popularity and some similarities in the concept of a young hero in a fantastical world that they might wrongly associate with common elements in some Japanese fictional works.
Maybe it's a misunderstanding. Some people might be confused if they've seen some crossover fan art or fan theories that mashed the two together in a really strange way. But in reality, they have no real connection in their original concepts.