It is National Superhero Day today. Obviously, superheroes are celebrated today. Stan Lee has said, "A superhero is a person who does heroic deeds and has the ability to do them in a way that a normal person couldn't. So in order to be a superhero, you need a power that is more exceptional than any power a normal human being could possess, and you need to use that power to accomplish good deeds." So, looping you in with our latest list of cool superhero movies that you can watch today.