One possibility could be that the Molecule Man's powers somehow disrupt the magic in the Harry Potter universe. Maybe he accidentally alters the molecular structure of Hogwarts, causing chaos among the students and teachers. Harry and his friends would then have to figure out how to reverse the changes and send the Molecule Man back to his own dimension.
I don't really know. It could vary depending on the artistic style and the intentions of the comic's author. You might need to do some in-depth research or check with the comic's fan community for a clear answer.
The main antagonist could be an evil version of the Molecule Man. Maybe in his own dimension, he was corrupted by power and when he enters the Harry Potter universe, he wants to take over there as well. He would use his molecular manipulation powers to create all sorts of disasters, like turning the Forbidden Forest into a deadly, mutated place. Harry and his friends, along with the good - natured Molecule Man, would have to fight against this evil version.
Sure. Well, comics often tell stories through a combination of pictures and text. For example, superhero comics like those of Superman usually start with the origin story. He's from the planet Krypton, sent to Earth as a baby. Then the comics show his growth on Earth, his discovery of his powers, and how he decides to use them for good. He faces various villains like Lex Luthor who try to defeat him. Each issue of the comic is like a chapter in the overall story, gradually building the character and the world around him.
One example could be a story where a single molecule is found in outer space that has the ability to terraform planets on its own. Another could be a scenario where a single molecule is used as a weapon that can dissolve any material it comes into contact with.
Single molecule science fiction could be about the potential of a single molecule having extraordinary capabilities. For example, a single molecule that can power a small device indefinitely. It might also involve the idea of a molecule being sentient or having the ability to transform matter at a microscopic level.