No.. prophecy doesn't say aliens will invade earth. And no I am not saying they plan to fabricate or even manifest a global invasion of demons masquerading as Martians on a global scale. They may "say" it and cause a panic without it every happening. And in today's world that appears plausible with all the false falg attacks being promoted in the media as if they are the real McCoy.
Yes, they may try this in certain areas soon, and yes they are already doing it on a small scale as we speak with all those so called sightings and abductions. As Christians we know aliens, green or otherwise are impossible. Prophecy does say the Vatican will get all the world to worship the pope, and in so doing generate a "common enemy" for all the world in us, the remnant of God. Prophecied disasters are about to increase and we the remnant of God will be blamed for it because we refuse to keep the Roman Sabbath holy.
Satan knows this is coming because he understands prophecy better then we do. These global disasters will be used to make us that common enemy that threatens the whole earth. If the people are already conditioned to come together as one against a common enemy. How far of a stretch would it be for them to see no wrong in killing us once the antichrist in Rome convinces them the global disasters are the end result of our breaking the Roman Sabbath.