Jesus saying I beheld Satan as lightning fall from heaven was prophetic of what would happened after the cross. So, Satan’s fall actually would be fulfilled by Jesus’ death on the cross because Jesus spoiled principalities and powers through his death.
John 12:31-32 says “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 judgment began by Christ death.
And Revelation 12:10, says “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.”
The GATHERING Place 