By now, you've probably watched the first Iron Man 3 trailer. It reveals that Iron Man is facing his absolute worst case scenario here — but that's not all.
When you go through the trailer frame by frame, it becomes obvious that Tony's actually facing two different nightmares. Spoilers ahead... In particular, there's the fact that Tony's home gets destroyed and all his suits of armor are trashed, and then there's the whole "losing control over his new armor prototype" thing that also seems to be going on. Check it out.
We start out with Tony apparently having crashed in the snow, with his suit looking totally trashed. You notice his chest light keeps flashing on and off. He's in kind of bad shape. Guessing this comes from later in the movie, when things are getting really bad for Tony.
The Mandarin peels back his hood — revealing a Captain America shield with an Avengers "A" in the middle. What's that about?
This seems to be Maya Hansen (Rebecca Hall), who appears to be in rough shape, having just been thrown to the pavement. In the comics, she's the scientist who develops Extremis.