The Adversary will remain the Adversary until kicked out of heaven during the sounding of the 7th Trumpet. The opening of the abyss was not for Satan's sake. It was so those on earth know exactly who they are dealing with. Humanity will know exactly who the Lamb is, and who Satan is. There will be no more deception nor excuse.
I hate to burst your bubble. Satan is already kicked out. Revelation 12 takes us back to the First Advent and identifies the incarnation and glorious resurrection/ascent to give us a sense of timing. This is definitely not talking about, or concentrated upon, the second coming. The focus is the banishment of Satan from heaven and his ongoing defeat on earth by the scenes as they overcome him by the blood of the lamb and the word of their testimony. Revelation 12 shows us what happened to Satan after sin, death, Satan and Hades had been defeated. It shows one major consequence for the devil. He lost his power of accusation. After all, sin had been paid for.
Before being cast out of heaven through Christ’s victorious assault on his kingdom the devil had access to both heaven and earth. He had the ability to come before God to accuse the brethren of their sins. When he was cast down he no longer had access to heaven but only to earth.
We know Satan is overcome because Christ overcame him. He can no longer accuse us before the throne of God, so he has to come to us direct down here and point the finger at us - that is if we listen him! Through the casting out of Satan, after man's penalty had been paid in full, he no longer had anything to accuse the elect over.
The only power that Satan possesses is that which man gives him. If every single human being on this earth ignored him, he would be totally impotent. But, there is a twisted tendency within man that prefers the voice of Satan to the voice of God.
Revelation 12 places the defeat of Satan at the resurrection/ascension:
"And she brought forth a man child, who was to rule all nations with a rod of iron: and her child was caught up unto God, and to his throne. And the woman fled into the wilderness, where she hath a place prepared of God, that they should feed her there a thousand two hundred and threescore days. And there was war in heaven: Michael and his angels fought against the dragon; and the dragon fought and his angels, And prevailed not; neither was their place found any more in heaven. And the great dragon was cast out, that old serpent, called the Devil, and Satan, which deceiveth the whole world: he was cast out into the earth, and his angels were cast out with him. And I heard a loud voice saying in heaven, Now is come salvation, and strength, and the kingdom of our God, and the power of his Christ: for the accuser of our brethren is cast down, which accused them before our God day and night. And they overcame him by the blood of the Lamb, and by the word of their testimony; and they loved not their lives unto the death."
Here, in correlation with Revelation 20, we see the end of Satan unchallenged deceiving of the Gentiles. John declares: "Now is come salvation, and strength, and the kingdom of our God, and the power of his Christ." How?
Previous to Satan's eviction, God was Israel's God, not the Gentiles God. Satan ruled the nations. But
through this casting out of Satan, after man's penalty had been paid in full, he no longer had anything to accuse the elect over. It was indeed finished! The powerful spread of the Gospel to the Gentiles lifting the deception that kept them bound. Satan was now bound. The boot was on the other foot. With the global expanse of the great commission the Gentiles now are without excuse. The ignorance is gone. The veil is lifted. The means by which God lifts deception is the preaching of the Word of God. This has now been successfully ongoing throughout the nations for 2000 years.
Satan's defeat came after the resurrection. Here is when he got his eviction notice, and here is "when" salvation came to the "whole world" - not just one nation Israel. The deception enveloping the Gentiles was lifted - praise God. They are now without excuse, just like those in the OT that rejected salvation. Salvation has now come to the nations. But Satan had to first be cast down. He had to be defeated. Christ’s life, death and resurrection safely secured that. As a result the Church becomes a militant overcoming organism.
Christ’s death, burial and resurrection was the decisive blow against Satan. His defeat has already been wrought. This passage plainly shows the powerful result of Calvary and the deep impact it had upon Satan. It shows us that Satan is now under Christ’s feet and is now subject to His Sovereign will. Satan and his minions are barred from heaven. They have been banished after they were defeated 2,000 years ago.
Christ predicted shortly before He destroyed the power of Satan at the cross, in John 12:30-33:
“Now is the judgment of this world: now shall the prince of this world be cast out. And I, if I be lifted up from the earth, will draw all men unto me. This he said, signifying what death he should die.”
Christ’s death, burial and resurrection was the decisive blow against Satan. His defeat has already been wrought. This passage plainly shows the powerful result of Calvary and the deep impact it had upon Satan. It shows us that Satan is now under Christ’s feet and is now subject to His Sovereign will. Satan and his minions are barred from heaven. They have been banished after they were defeated 2,000 years ago.
