What is destroyed in Revelation 17-20 is not only the Harlot, but the Harlot-with-Beast.  False Israel and the apostate, bestial oikoumene collapse together.  And this composite reality has a single replacement – the Bride that comes down from heaven, who becomes not just the replacement for the Harlot but for the whole Harlot-with-Beast complex. The church is not only the new Bride, but the new oikoumene.

The coming of the Bride is the beginning of the “ecumenical” age.