At a ball game, a close call gets replayed from three or four camera angles
before anyone rules on it. A runner tagging up, a throw to the plate, a
tag, an out call - then the replay from this side, and that side, and the
other, until the full picture assembles itself.
That is how Revelation works. John shows the same stretch of time again and
again from different vantage points, and chapter 20 is another angle rather
than the next event.
Chapter 19 carried us to the very end: final judgment, every enemy of God
destroyed. Then chapter 20 goes back to the beginning of the church age -
the period between Christ's first coming and his second, which is to say
the period you are sitting in right now.
Satan bound. The souls of those beheaded for the testimony of Jesus,
reigning with Christ. Then the release, Gog and Magog, the surrounded camp,
and fire from heaven that ends it in a sentence.
The thousand years is among the most fought-over passages in Scripture.
This sermon reads it the way John's own method demands: as another view of
now.
Same play. Different camera.