Is It Real?

If people have thought up an idea for a person or place, which no one has ever heard of, does that mean that it's not it isn't real? I mean, who can say that someone like Superman, Aquaman, and The Flash, or a group, such as the Green Lantern Corps. Or Justice League does not exist? They can be perfectly real yet be unknown to the rest of the world. Maybe they're not part of this world, galaxy, or maybe even this universe, but that doesn't stop them from being real. …