Originally Posted by cherokeesam
Marvel wasn't trying to "tease" Mandarin for three movies, though. We make that assumption, but the truth of the matter is that IM1 only hinted at his existence through Ten Rings (they didn't even explicitly say there was one single leader at that point); IM2 barely acknowledged Ten Rings at all, other than a blink-and-you-miss-it easter egg moment; and Shane Black started off IM3 as a spy thriller that was going to feature Ghost as the main villain. So there were never any plans to turn this into an "all roads lead to Mandarin" climax. Mandarin was only a late addition to the game for IM3.
If he's Extremis-ized, he becomes "super"villain enough. Any of the Extremis soldiers, including Killian and possibly Mandarin, are going to be doing shore-nuff car-slinging, fire-breathing superhuman feats.
And where did you get this information? I'm pretty sure Mandarin was in there plans from the beginning.