Father Seraphim Rose has written in many of his books, for example in his Orthodoxy and the Religion of the Future, that UFOs and Aliens are demonic.
That being said, it is important, whether Aliens and UFOs are real or the work of the devil, that images such as UFOs or monsters will probably be used to force the election of an Antichrist who will supposedly rescue us from these real or demonic entities.
Why else would the entertainment industry promote such fear campaigns?
I remember watching "V" several decades ago, and being scared out of my wits. Fear will be the main motivator to impel people to vote in an Antichrist, a false messiah, who might rescue them from fear, hunger, thirst, and hopelessness.