There are three great showdowns in the Bible…
The first is the Mount Carmel showdown (1 Kings 18: 21 – 40) which proved who God is.
The second is the Mount Transfiguration showdown (Matthew 17: 1 – 5) which proved who the Son of God is.
The third is the Mount Zion showdown (Revelation 19: 11 – 21) which proves who the Bride of the Son of God is.