Maybe the man is a fallen angel. He has lost his place in heaven but still retains some of his divine powers. He decides to use these powers to create a demigod out of the young boy, perhaps as a way to redeem himself or to create a being that can do good in the world.
The man could be an ancient wizard. He has studied the arcane arts for centuries and has discovered the secret to creating demigods. He sees the young boy as a pure soul, someone who can handle the power without being corrupted.
Perhaps the fanfic could start with the young boy living an ordinary life. Then the man comes into his life and reveals that he can make the boy into a demigod. The boy is initially scared but also intrigued. As he is transformed, he starts to notice changes in himself, like enhanced strength and senses. However, there could be a dark side to this. There might be other forces that want to stop the man from creating demigods, and they target the young boy. So the boy has to not only come to terms with his new powers but also fight to protect himself and the man who made him a demigod.
Well, it happened through a series of challenges and quests that the boy had to overcome. Each victory granted him powers and gradually led to his demigod status.
The young boy's family members could also be important characters. They might be initially unaware of the boy's encounter with the manmade demigod but later get involved. For example, the boy's father could be a skeptic at first but then become a believer and support the boy in his adventures with the demigod. And of course, there could be other characters in the world where the story is set, such as neighbors or local authorities, who react to the presence of the manmade demigod in different ways.
The plot might involve the young boy being chosen by the manmade demigod for a special mission. The demigod could be a creation of some powerful but unethical scientific experiment. The boy, with his innocence and courage, has to deal with the challenges that come with being associated with this demigod, such as facing those who want to use the demigod for evil purposes.
The plot could involve the young boy having a daydream where he becomes a part of the Young Justice team as Spider - Man. Maybe he uses his Spider - Man powers to help the team in a mission against some supervillains that are threatening the city. He could swing around, using his webs to save his new teammates from danger and show off his unique abilities to the other heroes.
It could be about a young boy who discovers the world of Ant - Man and gets inspired. Maybe he dreams of having powers like Ant - Man, shrinking and growing at will. He might start to follow Ant - Man's adventures closely, collecting comics or toys related to the character.
Well, it depends on how the author develops the story. It might focus on the boy's growth and struggles with his newfound powers. Or, it could have a complex plot involving battles against evil forces.
It's not that common. Usually, fanfics focus on specific aspects or characters rather than combining these two. But it can happen if the author has a unique idea.
In this fanfic, the young boy might be an ordinary kid who stumbles upon Ant - Man's technology. This discovery could lead him into a world of adventure, where he has to learn how to use the Ant - Man suit's powers quickly. He could face challenges like bad guys who want to steal the suit or getting lost in the microscopic world.
Yes, there could be. Fanfiction is very diverse and creative, so it's possible someone has written such a story.