When God is "all in all" in the coming age, anything or any one who was not aligned with God's plan will simply not "be" any more.
The current heaven and the current earth will "pass away" at the end of this age. Also, there will be no sea. The "sea" is allegorical language that can be understood to be "the sea of humanity". There will be no more aimless throng of people.
Some might say "But see, the Bible says 'But there shall by no means enter it (New Jerusalem) anything that defiles, or causes an abomination or a lie, but only those who are written in the Lamb’s Book of Life.' so there must be things that can defile and lie after when this coming age is upon us.
Not so, the Bible also records 'Its gates shall not be shut at all by day' and some will think 'So then the gates must be shut at night'. But when we read on we see 'there shall be no night there'.
This is an absolute contrast of normative language written so that men would understand it. In the age to come, when God is all in all, there will be no schism between what is God and what is not God. There will be only God. And everything, because God is in them, will align with His purposes.
The entirety of the new heaven and new earth will be filled with God with no schism.
These things are understood by being a study of the character of our Father not through the study of Greek, Hebrew or Hermeneutics. I like Hermeneutics but like so many things, if you do not have love (the Father) your understanding will be skewed from the truth.