What makes an effective teaser? I loved the first one. It had great drama with the sound of the diving Stuka and the soldiers cringing. In a full trailer though, I like to get a real sense of the mood of the piece - is it going to be full of action? Does it have an epic feel to the battle scenes? ("Battle Of Sevatopol") Will it have a retro-comic book tone? ("Wake Island" with the tag line "Wake Island, the Alamo of world war two" "All they had were guts and each other!") Will it have a patriotic feel ("Saving Private Ryan") Are they selling me on the size and quality of the cast and its star power? (à la "A Bridge Too Far") Is there some kind of suspence or twist to the story? ("Allied") Will it try to be a historically accurate retelling of a specific event? ("Anthropoid") Are they going to show me both points of view? ("The Longest Day") Are they ruining the plot by telling me too much? If you think back to the movie "Atonement" it was a romantic drama. Dunkirk is just one short show stopping sequence in the movie (though all important to the resolution of the central character conflict). https://www.youtube.com/watch?v=rkVQwwPrr4c There is a lot of information crammed into a couple of minutes. The trailer gives a very accurate idea of the movie. You know exactly what you are going to see. Compared to that, I'm not sure if Nolan is aiming to make a visual tone poem, or an epic. Whose point of view are we going to get? "Hope is a weapon" What does that mean? "Survival is victory" Okay I can get behind that given what I know about the event. When I saw the preview for "Interstellar" I knew I was going to see it in theaters. Opening week-end. I knew who the main character was, that Mathew McConauhey was the star. It was his story and it was going to be BIG! It was going to have BIG scope and ideas!