The trailer for "Iron Man 3" has hit the web . . . and the movie looks pretty dark, almost like a Batman movie.  Tony Stark is obviously dealing with the after-effects of the events in "The Avengers".

--ROBERT DOWNEY JR. says, quote, "Nothing's been the same since New York.  I can't sleep.  And when I do, I have nightmares."

--We also get our first look at the villain, Mandarin . . . who's played by BEN KINGSLEY.  (--The movie comes out May 3rd.)