American preview also showed the Michael search party, Jack, Sawyer & Locke, hearing shots in the woods/forest and falling to the ground yelling Michael then at night it appears they are surrounded by a circle of people with torches and you hear a mans voice say something like "this is our island".
I also saw a womans figure in the black mist/smoke. I did not tape it and that was the only image easily noticable in real time viewing. Could not tell who it was tho. I cant wait until they explain the mist and as Charlie pointed out, how the plane from Nigeria wound up in the South Pacific (if that is where they are).