This wife of the Lamb is none other than the New Jerusalem (21.9,10).

God is now in His holy temple, so that the voices of praise from the great multitude come also from the temple. During the millennial kingdom the overcomers shall be kings in the city and priests in the temple. But the temple shall gradually lose its prominence until it totally disappears, for God and the Lamb will be the temple in New Jerusalem in the new heaven and the new earth.

Of the church, some (for example, the five wise virgins) will attend the marriage feast, while some (for example, the five foolish virgins) will not be able to attend the marriage feast.