The following problems that J. Webb Mealy raise are never dealt adequately—or at all—in Amillennial literature. I think it is because they are deeply problematic for their system.
“[Amillennialism believes since] Satan’s release from prison and destruction (Rev. 20:7–10) is connected with the parousia, then the time of his imprisonment “so that he should deceive the nations no longer” (20:3) seems to be coterminous with the career of the beast (which also ends at the parousia). But this is impossible, since the beast’s career is portrayed in Revelation as the time of Satan’s greatest success ever in deceiving the human race (fn. In Rev. 12:9, Satan is characterized as the one who “deceives the whole world.” In context, the events of ch. 13 graphically picture the full outworking of this deception, and by no means its limitation).
Further, it does no good for this view to over-interpret the report of Satan’s release from the abyss in Rev. 20:8 to mean that the only sense in which Satan had previous been bound was that he could not then deceive the nations in such a way as to “gather them together for the war.” For to do this is not only to ignore the explicit cosmological import of such passages as Rev. 12:9–17, but it is also to forget the fact that “Har-Magedon” is but the last episode in Satan’s “war” with the saints. In Rev. 13:7 it was the beast himself who was given authority throughout his career and who was, in concert with Satan, to “make war with the saints and to overcome them.” The beast’s career, in other words, far from being the time of Satan’s binding in this regard, is undeniably the time of his power par excellence to deceive the nations into making war on the “camp” of the saints.” It is thus only at the parousia that the power to practice even this particular kind of deception is taken away from Satan.
What is taken away for the first time at the parousia is however, given back a thousand years later, when Satan is released from the abyss, and is permitted once again to instigate an attack on the people of God (Rev. 20:7–10). Thus a completely lucid and coherent sequence is established between Rev. 19:11—20:3 on the one hand, and 20:7–10 on the other: the power to deceive is first removed from Satan, and then subsequently restored. This means that the battle described in 20:7–10 can in no way be identified with the battle of Har-Margedon, since in spite of any similarities between the two scenes, what happens to Satan in the one manifestly precedes what happens to him in the other” (Mealy, After the Thousand Years, 20–21).