So ladies and gentlemen, go check out the the new Iron Man 2 trailer and pay attention to the scene shown at 1:23-1:26 into the trailer. Anyone else notice the metallic coloured wires / veins around the arc reactor in his chest?
Also the trailer begun with a circular emblem on the Iron Man chest plate, but at roughly 2:16 into the trailer Iron Man and War Machine are fighting, as yet, unidentified enemies. But the chest plate of the Iron Man suit now sports a triangular design.
Is it just coincidence that they happen to use a chest design that is iconic of the Extremis armour while also depicting suspiciously metallic or technological veins in Stark's chest? What does everyone else think?
I've not heard anything stating explicitly if Extremis will or will not be in the film. So I'm hopeful that these metallic veins and the chest design are a sign that at some point in the film Stark will fuse the Extremis Enhancile with his body. Perhaps not entirely like the comic depicts, but close enough that it fits in with the feel and style that suits the setting established by Favreau.