In this drawing we just let our imagination run wild. We visualized Superman toys games and a radio show - that was before TV - and Superman movies. We even visualized Superman billboards. And it's all come true.
Well I look at it like this: When you go to a restaurant the less you know about what happens in the kitchen the more you enjoy your meal. If the soup tastes good everything's cool and you don't necessarily want to know what's in it. The same thing holds true with movies.