Source: moviepilot.com

9. Where'd The Red Skull go?

Captain America: The First Avenger is one of my all-time favorite Marvel movies. But there's one thing about it that's always bugged me: What happened to that Red Skull fellow?

Seriously, the end of that movie had him holding the Cosmic Cube stupidly named thing that I hate calling by its dumb movie name…*grumble grumble*…"Tesseract" as it opened up a dimensional gate above him. He was then sucked into it, and he disappeared.

And we never saw him again.

Pulling back the curtain for a moment, this happened because Hugo Weaving does not like to do sequels. He just doesn't. And he’s said before that he has no interest in returning to the story of The Skull. So without him, it looks like Reddy might as well be dead for the time being. Things – and people's minds – do change, however, so we don't know anything for sure. But if I were a betting man, I'd say we won't get this mystery answered any time soon.