I'm underwhelmed by the trailer atm. Hate to be such a debbie downer, but...
As great as Kingsley is as an actor, the Mandarin feels like such an odd, whitewashed character, and there doesn't seem to be any ethnicity to him. All that aside, the rhetoric of his speech sounded boring and derivative.
I didn't get any of the excitement I felt from the trailers of the first two movies. Tony Stark suddenly starts tripping balls after learning to control his suit by remote, and some goofy helicopters blow up his house. Cool.