Over the past 75 years, DC and Marvel have introduced hundreds of thousands of characters in their comics. Cultural icons like Superman, Batman, Spider-Man, Wonder Woman and Captain America have appeared in everything from Saturday morning cartoons to big budget blockbusters. But they all have one thing in common: they got their start in comics. That’s not always the case. Superhero TV shows and movies often introduce totally new characters — and some of them are so well received that they make their way back into the comics.