5. Aldrich Killian

For what is worth, Aldrich Killian might have been the best villain of the Iron Man trilogy, if it wasn't for that unnecessary Mandarin twist. In the comics, he is just one of the developers of Extremis, committing suicide after selling the virus to terrorists.

In Iron Man 3, this villain marks the introduction of actual superpowers and abilities in this particular franchise. The man can breathe fire and gives Iron Man a whooping, despite Tony having changed several suits during the fight. Regeneration, fire-based powers, super-strength, and super-reflexes "“ he is on a different level than the villains mentioned before him.

Unfortunately, he is killed by Pepper Potts. Twists after twists this Iron man 3 was"¦

On the next page, a newcomer!