"But now in Christ Jesus you who once were far away have been brought near BY THE BLOOD OF CHRIST. For He Himself is our peace, who has made the two groups one and has destroyed the barrier, the dividing wall of hostility, by setting aside in His flesh the law with its commands and regulations. His purpose was to create in Himself ONE NEW HUMANITY out of the two, thus making peace, and in one body to reconcile both of them to God through the cross, by which He put to death their hostility." (Ephesians 2:13-15)
God not only will unite humanity into one redeemed body, but will reconcile ALL other created beings to God through the blood of Christ Jesus.
"For God was pleased to have all His fullness dwell in Him, and through Him to RECONCILE TO HIMSELF all things, whether things on earth or things in heaven, by making peace through HIS BLOOD, shed on the cross. Once you were alienated from God and were enemies in your minds because of your evil behavior. But now He has reconciled you by Christ’s physical body through death to present you holy in His sight, without blemish and free from accusation." (Colossians 1:19-22)
The God of the Bible is able to do what He has planned - to become All in all.
"Out of Him and through Him and for Him is ALL" (Romans 11:36).
"God and Father of ALL, Who is over all and through all and in ALL" (Ephesians 4:6).
"...all things shall be subdued unto Him, that God may be All in ALL" (I Corinthians 15:22-29).