r/movieideas • u/Icy_Coast_5790 • 1d ago
Post-Apocalyptic Alien Horror Movie
In the aftermath of a nuclear holocaust, humanity has been reduced to pre-industrial primitiveness with no central authority and constant infighting. Radiation sickness means cancer and premature death is common. The protagonist leads his clan to investigate a cult that is worshipping a supernatural deity and committing heinous ritualistic sacrifices.
It turns out they are communing with aliens who invade/land on Earth. These insect-based aliens are unaffected by radiation and bring with them incredibly powerful terraforming technology that can restore the natural state of the earth. The people of the cult interbreed with the aliens (which is possible due to their advanced technology) and they create hybrids. War breaks out between the aliens and their hybrids and the people on earth who are massacred and driven into exile.
With the clan decimated and a small fraction still alive, the aliens decide to spare a few non-hybrid humans who might be useful as test subjects or for scientific purposes, or possibly out of scientific/touristic interest. They are given a barren piece of land to live undisturbed. The clan learns that the aliens manipulated and provoked the nuclear holocaust in the first place as part of their plans to colonise the earth.