New Delhi, Feb. 9 -- Steven Spielberg is marking his return with his much-awaited film this summer. The first trailer of the legendary director's upcoming film, Disclosure Day, was unveiled during the Super Bowl on Sunday. Starring Emily Blunt and Josh O'Connor in the sci-fi movie, the plot of Disclosure Day has been kept a mystery.

Going by the latest trailer, Disclosure Day revisits the extraterrestrial life debate as it seemingly revolves around mankind getting close to the existence of aliens.

The trailer clip opens with a news anchor reporting on a "threat to publicly release government material, long shrouded in secrecy." O'Connor's character is seen on a mission to disclose the same material, presumably proof that aliens are real...