I loved the trailer, hopefully the film holds up, as the Iron Man 2 trailer looked awesome too. I like the darker tone, because Tony himself will never be too dark, it'll make the comedic piece pop. The only thing that will really disappoint me is that this settles contractual obligations with RDJ and if this film is awesome with Shane Black taking over the helm, I'd hate for it to stop here and not continue. This is what we should have gotten in the second installment, something darker and something that allowed for a expansion on the ideas given in the first, Extremis is a natural progression whereas Iron Man 2 overall seemed to pander to set up The Avengers more than actually continue Tony's story.