I remember the scene in Dune 2 where Paul is walking out onto the ledge to see the hundreds of thousands of Fremen below him being in the trailer for Dune 2. When that happened in the movie, I wished I hadn't seen that in the trailer. It would have made it even more goosebump-inducing, for me.
As far as I'm concerned, I got enough from the first Dune 3 trailer. It looks incredible and Denis hasn't let me down, even once.