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The Ultimate Iron Man's Secret Was Too Terrible For The MCU To Adapt
The Marvel Cinematic Universe wears its Ultimate Marvel influence on its sleeve, but their most important character Iron Man has very little to do with his Ultimate counterpart — by design. Written by famous science fiction writer Orson Scott Card, the series was not as well-received as the other hero revamps in the Ultimate line and was quietly buried and eventually forgotten. Of note is Tony's unique physiology — he's barely even human — and he lives with a secret that was simply too strange for the MCU to adapt.