"A passenger has died,” announces Kenneth Branagh’s Hercule Poirot near the start of this new trailer for 20th Century Fox’s upcoming Murder on the Orient Express. “The murderer is on the train now. Everyone is a suspect. So let’s catch a killer.” That’s about as efficient a bit of dialogue as you’re likely to hear in any trailer, neatly setting up the premise for this star-studded Orient Express for anyone who hasn’t read the book or seen Sidney Lumet’s 1974 screen…