As i see it, this passage isn’t speaking of a new universe, but a city & its gates, with the wicked outside of them:
Rev.22:14 Blessed are they that do his commandments, that they may have right to the tree of life, and may enter in through the gates into the city. 15 For without are dogs, and sorcerers, and whoremongers, and murderers, and idolaters, and whosoever loveth and maketh a lie.
It’s gates will never be closed:
On no day will its gates ever be shut, for there will be no night there. (Rev.21:25)
The kings of the earth will bring their splendor into it:
24The nations will walk by its light, and the kings of the earth will bring their splendor into it. 25On no day will its gates ever be shut, for there will be no night there. 26The glory and honor of the nations will be brought into it.
How can they do that unless they were outside the city gates before?
“In the Book of Revelation, the phrase “kings of the earth” appears 7 times in Rev 6:15; 17:2,18; 18:3,9; 19:19; 21:24. In all but the last citation the kings of the earth are portrayed in Revelation as aligned with Mystery Babylon and are the enemies of God. Yet, in 21:24 we find that the “kings of the earth” will one day bring their splendor into the New Jerusalem. One must therefore ask how or why are the kings of the earth who are consistently and without exception portrayed in Revelation as evil and unrepentant, allowed into the New Jerusalem where “nothing unclean will ever enter it, nor anyone who does what is detestable or false, but only those who are written in the Lamb’s book of life” (21:27). I cannot find any scriptural evidence that these kings of the earth are any different than the previous references. Therefore the only conclusion I can arrive at is it that appears that even the kings of the earth after having spent some unknown time in the lake of fire will one day repent and be allowed to enter into the New Jerusalem.”
That recalls some other passages about kings:
Yea, all kings shall fall down before him: all nations shall serve him.
So the nations will fear the name of the LORD And all the kings of the earth Your glory.
All the kings of the earth will give thanks to You, O LORD, When they have heard the words of Your mouth.
2"For behold, darkness will cover the earth And deep darkness the peoples; But the LORD will rise upon you And His glory will appear upon you. 3"Nations will come to your light, And kings to the brightness of your rising.
The nations will see your righteousness, And all kings your glory; And you will be called by a new name Which the mouth of the LORD will designate.
By its light the nations will walk, and into it the kings of the earth will bring their glory.
If God meant only some/most of mankind, why would He say “all mankind”?
Isa.66:23 And it shall be from new moon to new moon And from sabbath to sabbath, All mankind will come to bow down before Me," says the LORD.
Isa.66:24 And they shall go forth, and look upon the carcases of the men that have transgressed against me: for their worm shall not die, neither shall their fire be quenched; and they shall be an abhorring unto all flesh.
(1) First of all, Isa.66:22-24 makes no mention of what has become of the souls of the “corpses” referred to:
23 And it shall come to pass, that from one new moon to another, and from one sabbath to another, shall all flesh come to worship before me, saith the LORD.
24 And they shall go forth, and look upon the carcasses of the men that have transgressed against me: for their worm shall not die, neither shall their fire be quenched; and they shall be an abhorring unto all flesh.
(2) Secondly, nothing in verses 22-24 says verses 23 & 24 refer to the lake of fire or the new earth. Consider Option A at the following re a premillennial take on Isa.65 & 66:
(3) I wonder how “corpses” (v.24) would survive in a lake of fire. Or worms (v.24) . OTOH worms could survive in a millennial eon garbage dump called Gehenna. As could “corpses” survive that were in parts of the garbage dump that were not completely consumed by fire.
(4) If it were the new earth, why does verse 23 refer to new moons and the sabbath?
“The sun shall be no more thy light by day; neither for brightness shall the moon give light unto thee; but the Lord shall be unto thee an everlasting light, and thy God thy glory” (Isa.60:19)
Rev.21:22 But I saw no temple in the city, because the Lord God Almighty and the Lamb are its temple. 23 And the city has no need for sun or moon to shine on it, because the glory of God illuminates the city, and the Lamb is its lamp. 24 By its light the nations will walk, and into it the kings of the earth will bring their glory
25 On no day will its gates ever be shut, for there will be no night there.
26 The glory and honor of the nations will be brought into it.
(5) Even if the reference is to the new earth, if there are still “corpses” of the dead in the lake of fire, how is it that death has already been abolished (1 Cor.15:22-28)?
“Just as surely as the abolition of slavery entails freedom for those formerly enslaved, the abolition of death entails life for those formerly dead.”
(6) For an interesting take on our passage, there is this alleged view:
"It is interesting that many of these comments touch on the concept that is well-articulated by C.S. Lewis’ mentor, George McDonald, in his sermon, “The Consuming Fire.” The concept is that God himself is the consuming fire and he will burn away all our iniquities, including those of Satan, who will emerge from the experience as the purified Lucifer, as he was created to be. This is what is pictured in Isaiah 66:24 where all beings will look upon their old selves as carcasses burning in God’s eternally consuming fire. To understand this picture one must realize that the perspective is that of a totally redeemed eternal being looking back on his or her past life and sensing some regret for their own sins."http://theologicalscribbles.blogspot.ca/2011/08/origen-on-salvation-of-devil.html
(7) In any case, when death is abolished (1 Cor.15:22-28) & all are made new (Rev.21:5, 5:13), the dead in the second death (lake of fire) will rise back to life “in Christ” & God will be “all in all” (1 Cor.15:22,28). IOW there will be universal salvation of every person that has ever lived since Adam was created.
I don’t see that stated or implied.
IMO the separating is regarding the last statement, i.e. the verse (Rev.21:7), before it saying “The one overcoming will inherit all things, and I will be his God, and he will be My son.”
Rev.5:13 And every creature which is in heaven, and on the earth, and under the earth, and such as are on the sea, and all that are in them, heard I saying, Blessing, and honour, and glory, and power, be unto him that sitteth upon the throne, and unto the Lamb for ever and ever.
As i’m seeing it, this is a vision that the apostle John received from the Lord Jesus Christ. And in the first part of the verse (Rev.5:13a) the reference is to the entire old heavens & earth, not the new universe. For there is no sea in the new heavens & earth (Rev.21:1).
Then, in the second half of the verse John envisions everyone in the old universe worshipping the Saviour of the kosmos, the Lamb of God Who takes away its sin (cf. John 1:29; 4:42).
This universal salvation vision cannot have its actual fulfillment in the old universe, so it will have to be fulfilled in the new universe, when God will be “making all new” (Rev.21:5).