The way I am seeing this is all of humanity has been given physical life, none will be 'born' into the kingdom and receive spiritually bodies until they have a 'spiritual' ressurection.
John 3:3 Jesus answered and said to him, "Most assuredly, I say to you, unless one is born (Strong 1080, gennaō - regenerate) again, he cannot see the kingdom of God."
v.6 That which is born of the flesh is flesh, and that which is born of the Spirit is spirit.
v. 7 Do not marvel that I said to you, "You must be born again.'
v. 8 The wind blows where it wishes, and you hear the sound of it, but cannot tell where it comes from and where it goes. So is everyone who is born of the Spirit."
We see in this statement that Christ made that we must be "born of the Spirit." Born means regenerated, that is the "change" that Paul talks about (1 Cor 15:52). But first all human being must be begotten and begin the proces to learn righteousness and be brought into His image, for the few now and the rest in the Lake of Fire.
1Peter 1:3 Blessed be the God and Father of our Lord Jesus Christ, who according to His abundant mercy has begotten us again to a living hope through the resurrection of Jesus Christ from the dead,
v. 4 to an inheritance incorruptible and undefiled and that does not fade away, reserved in heaven for you,
v. 5 who are kept by the power of God through faith for salvation ready to be revealed in the last time.
We are begotten now in this life, but we must judge ourslves and begin to "live to righteousness" and "die to sin"/self.
1Peter 2:24 and He Himself bore our sins in His body on the cross, so that we might die to sin and live to righteousness; for by His wounds you were healed.
When Christ returns there will be the resurrection of the dead, but there is two categories "just and the unjust (Strong 49,adikos - unjust; by extension wicked; by implication treacherous; specifically heathen: - unjust, unrighteous)."
Act 24:15 I have hope in God, which they themselves also accept, that there will be a resurrection of the dead, both of the just and the unjust.
The Elect are going through this process of dying to self now, the rest will have to go through this same process while still physical in the Lake of fire. The world will be ruled by Christ and the Elect and the monumentous task of saving all of humanity will get underway.
That is how I understand it anyway.
mercy, peace and love
Kat