I knew it was World War II, but I was with someone who had no clue what this was was supposed to be based on that teaser. Even asked me if this was some kind of science fiction movie. And I understood where he was coming from.
I'm interested in this because of Christopher Nolan, but that teaser did absolutely nothing for me. I have to think most people in the general audience (that aren't already interested becaus of Nolan) will go "WTF was that?"