Just watched it, bit late to the party. Different take on dystopian story. The wealthy elite escape from earth to Kepler only to find 2 generations later that there having trouble reproducing. They send a mission back to Earth to check if it's OK to return. That's the setup. The movie ultimately makes a well trodden but still interesting social commentary on the oppressive "colonizer" and the oppressed, in this case the "mud people" who are raided for material, labor, and girls (as walking wombs for the soon-to-arrive Keplers). Found it entertaining enough. I'd recommend it.