Does this Iron Man 3 concept art spoil Tony Stark's new secret weapon?S

Marvel is paving the way for some big Iron Man 3 announcements at Comic-Con — starting with this piece of concept art, which seems to hint at the popular Extremis storyline from the comics (which has been rumored for some time now).

Take a look at this new art, posted over at the Avengers Facebook page. The mist around his arm seems to imply the extremis bytes forming his brand new suit! What do you think?