I use to think about the possibility that Satan, a fallen angel, would be the Antichrist in human form by shapeshifting to look like a human in the flesh like the angels in Sodom did (Gen. 19:1-5) until I realized that the beast (AC) & the False Prophet are thrown alive into the Lake of Fire (Rev. 20:10) when Jesus returns to Earth while Satan is chained up for 1,000 years in the bottomless pit (Rev. 20:1-3, 7) during Jesus' reign on Earth after which Satan is let loose for a little season (Rev. 20:3 1/2 yrs.?) before he is thrown into the Lake of Fire (Rev. 20:10) where the beast and False Prophet already were being tormented. So Satan couldn't be the Antichrist since Satan wasn't thrown into the Lake of Fire at the same time that the Antichrist beast and the False Prophet were.

 But in my 4/27 post IS IT POSSIBLE THAT THE FALSE PROPHET COMES UP FROM THE EARTH IN A UFO? I discussed the possibility of Satan who entered Judas (Luke 22:3, John 13:27) may very well enter the Antichrist to give the Antichrist supernatural powers to create great signs & lying wonders and at the same time giving the False Prophet power to do signs and miracles within the Antichrist's sight which would also be within Satan's sight with him being inside of the Antichrist. I realize this is only a theory.  However, in the video & transcript of (8) Ritual Abuse Survivor Exposes the Vatican, Blood Rituals the Global Death Cult SS EP04 - YouTube a satanic ritual abuse survivor said that she witnessed Satanic rituals in rooms under the catacombs beneath the Vatican City where children were sacrificed, their flesh eaten and their blood drank by people in high places, such as, global leaders, politicians, & even by Popes, etc.  She also said that when a child is brutalized and then killed as sacrifices during a satanic ritual in homage to Satan that 'entities' can enter the room, and then people at these satanic ritual ceremonies can voluntarily take an entity into themselves to take over their soul. She didn't say whether the 'entity' was a demon or a fallen angel.  However, we do know that Jesus cast out many demons from people and the Bible tells us that Satan entered into Judas. So I am thinking more and more about Satan entering the Antichrist to give him Satanic powers to do great signs and lying wonders, and Satan inside of him gets to rule along with the Antichrist and be worshipped because the Bible does say that the people worship both Satan and the beast, Antichrist, (Rev. 13:4,8) along with worshipping the image of the beast (Rev. 13:15).  If my theory is correct, then Satan, god of this world (2 Corin. 4:4) would be inside of the Antichrist, the son of perdition, as the AC sits in the temple of God as God showing himself that he is God (2 Thess. 2:3-4) and now he can perform great signs and lying wonders while Satan gives him power to do so. Then Satan, a fallen angel, would be inside of the Antichrist, whose human body and soul is fully possessed by Satan.