A lot of discussion going on about this...a lot of people are under the belief that, in the movie, Hydra will "replace" Nazis in WWII because there haven't been any swastikas in anything that's come out from the movie. In actuality (according to the director), Hydra has it's origins as a branch of the Third Reich in the movie. So Hitler and the Nazis and all that stuff is still there, Cap will just be dealing (from what we know) primarily with Hydra and it's leader, the Red Skull, in the movie.