Aliens announce their presence in latest Disclosure Day trailer

There are different marketing strategies when it comes to movie trailers. One is the Project Hail Mary approach, in which the final trailer pretty much gives away the entire movie, trusting that the audience will still come along for the ride because it's a sci-fi adventure, not a whodunnit. The other extreme is Universal Pictures' deliberately vague trailers for Disclosure Day, director Steven Spielberg's return to his "aliens are among us" roots, which give tantalizing hints about the basic premise and little more.