Last night I dreamed that I saw a second (and very detailed) trailer for IM3. It implied that Pepper died at the hands of the Mandarin and that Tony replaced her with a LMD of her because he couldn't live without her. Repression of reality can be very effective. But when they get attacked again by the Mandarin it becomes obvious that she's just a LMD but Tony still refuses to accept that Pepper is actually dead.
It was a very emotional scene and even though this story arc won't happen in the real movie I kind of wish it would because this dream was very powerful and thrilling.
Maybe in IM4