Originally Posted by Tony Stark
I think this is the most likely scenario. The fact that Tony has the shrapnel removed is nothing new, that was in the comics, and he was given an artificial heart. I am wondering if we will see something similar here. He may not have the arc reactor, but I think the Extremis virus will give him a direct interface to it.
However it's given me new thought to what Joss Whedon said after watching IM3, "Now what am I supposed to do?"