What About the Book of Revelation?

What is the book of Revelation? It's basically four things:

1. Revelation is a prophetic interpretation of the cataclysmic events of the AD 60s/70s.

2. Revelation is a prophetic critique of the Roman Empire.

3. Revelation is a prophetic exposé of the idolatry of empire and civil religion.

4. Revelation is a prophetic portrayal of the eventual triumph of Christ.