The issue of the "Battle of Armageddon" will never be in doubt. The previous summoning of the birds and beasts of prey, prove this'. Before the destruction of the army of Antichrist, he and the False Prophet will be cast "alive" into the "Lake of Fire." This shows that they are not "Systems" but "Persons," and as Enoch and Elijah were taken to Heaven without dying, so Antichrist and the False Prophet will be cast into the "Lake of Fire" without dying, and will be still there and alive when Satan is cast in a 1000 years later.
Before Antichrist is seized and cast into the "Lake of Fire," Satan will make his exit from his person, and after the battle is over, Satan will be bound and cast into the "Bottomless Pit," where he will be "sealed up" for 1000 years'. This is the culminating act of the "Tribulation Period."