I'm one of the few adult readers who can enjoy superhero comic books on a base level. I understand there's an actual story that takes place, but I'm just as content to see characters get punched in their faces and planets blowing up.
And to expand on my explanation, if you were to take Batman and apply him to that same story, I wouldn't even follow it. To me the story isn't important. I like the main character and so I was 90% sold right there.