Close you eyes for a minute, and imagine a typical fictional setting: It could be a city full of superheroes and supervillains, a fantasy world where forces of good battle forces of darkness, a sci fi universe where stalwart space pilots ward off bloodthirsty aliens, etc. This world can be anything, as long as it has a personified good (protagonist), and a personified evil (antagonist). You have the world down in your head? Good. Now, erase the villain. Let's just say that one day, in this world, all forces of evil just disappear. No one knows what happened to them, where they went, and why they were taken. They just vanish. How does this affect the fictional world? How would the heroes respond to it? How would the general public/civilians respond to it? What would eventually happen to this world as time went by without any antagonist to inhabit it? What would it look like?