The story is said to be in the same vein as the 1977 Steven Spielberg classic Close Encounters of the Third Kind, which followed a man searching for extra-terrestrials on Earth.
Nothing has been confirmed in regards to the story, but a report from earlier this month uncovered clues from a "mystery box" that was revealed on director Brad Bird's Twitter page. The box contained a number of items connected to the year 1952, which was previously the movie's working title.
Brad Bird is directing from a screenplay by Damon Lindelof. It isn't known when production will begin.