Steven Spielberg's "Disclosure Day" packs a hopeful message into its alien-centric story, and there's plenty to dive into about what the movie wants to say.

Steven Spielberg’s “Disclosure Day” is one of those movies that sweeps you up from the start and rarely lets you down.

Set in the present-ish day, it opens with cybersecurity whistleblower Daniel Kellner (Josh O’Connor) having stolen the world’s greatest secret from his spooky men-in-black employers in a bid to expose...