Exploring a multiverse filled with powerful cosmic entities, dimension-hopping demons, and mad titans obsessed with mortality, the world of Marvel has produced one of the biggest fandoms in the comic book industry. The home of heroes like Captain America, Iron-Man, and Spider-Man, has created some of the most well-known stories and characters in the comic book world. I think it's safe to say one of the most popular comic book companies in the world is Marvel Comics.