Dark plot points cut from Marvel movies

Marvel Studios has taken a niche world of characters and stories and managed to craft them into a cinematic universe that is, if box office records are any indication, universally appealing. It's a pretty incredible accomplishment. That being said, in order to make some of their comic book stories more palatable to a wider audience, some major moments haven't made it to the screen. As any longtime reader could tell you, this is understandable—Marvel Comics can, after all, go to some pretty dark places.