The Iron Man 3 media blitz continues to ramp up leading to its May 3, 2013 release. Today, via Marvel's twitter account, Marvel Studios released a new poster featuring actor Guy Pearce as "brilliant geneticist Aldrich Killian."
The co-creator of "Extremis" (much more on that here), Aldrich Killian is not a character with a ton of history in the
Marvel Universe. In fact, he died in the same story he was introduced
in, the Warren Ellis/Adi Granov "Extremis" arc that serves as partial
inspiration to the Iron Man 3 plot.
Presumably, this means one of two possibilities: The character will
depart a good deal from the source material, or Pearce has a pretty
small (though seemingly important) role. But getting his own movie poster suggests that maybe the former is the surer bet.