I think most will come out of the fire. I believe, unfortunately for them, if they lost a member, they can't regrow it. Presently, we can grow new members if we give up sinful members. Conditions will change -- there is no more sea -- so some will remain incomplete without further chances to become complete. Thus they will not be able to enter the Holy City.
Matthew 13:47 Again, the kingdom of heaven is like unto a net, that was cast into the sea, and gathered of every kind:
48 Which, when it was full, they drew to shore, and sat down, and gathered the good into vessels, but cast the bad away.
49 So shall it be at the end of the world: the angels shall come forth, and sever the wicked from among the just,
50 And shall cast them into the furnace of fire: there shall be wailing and gnashing of teeth.
I think the kingdom has always been like a net where what was good was kept and preserved while the bad was cast back into the sea -- for recycling. Maybe the next time it is caught in the net, it will be worth saving. So it goes until the sea will be no more. Then what is not worth saving will be cast into the furnace of fire.