I believe that God renews things as He has promised. I don’t think that means that all people will then have eternal life, because:
These will go away into eternal punishment, but the righteous into eternal life.
Mat. 25:46
For the wages of sin is death, but the free gift of God is eternal life in Christ Jesus our Lord.
Romans 6:23
Where was Christ and what did he do for the three days after his crucifixion?
What does Romans 14:9 say about the dead?
Matthew 12:40
For as Jonah was three days and three nights in the belly of a huge fish, so the Son of Man will be three days and three nights in the heart of the earth.
Note: Christ was laid in an above ground tomb. Where is the heart of the earth?
1 Peter 3:18-20
For Christ also suffered once for sins, the righteous for the unrighteous, to bring you to God. He was put to death in the body but made alive in the Spirit. 19 After being made alive, he went and made proclamation to the imprisoned spirits— 20 to those who were disobedient long ago when God waited patiently in the days of Noah while the ark was being built. In it only a few people, eight in all, were saved through water,
Ephesians 4:8-10
This is why it says:
“When he ascended on high,
he took many captives
and gave gifts to his people.”
9 (What does “he ascended” mean except that he also
descended to the lower, earthly regions?
10 He who descended is the very one who ascended
higher than all the heavens,
in order to fill the whole universe.)
1 Peter 4:6
For this is the reason the gospel was preached even to those who are now dead, so that they might be judged according to human standards in regard to the body, but live according to God in regard to the spirit.
Romans 14:9
For this very reason, Christ died and returned to life so that he might be the Lord of both the dead and the living.