What exactly were you rebutting?
Paul wrote in Romans 14:
…for it is written, “As I live, says the Lord, every knee shall bow to me, and every tongue shall confess to God.”
Doubtless Paul was quoting from Isaiah 45. the verb for “shall bow” is a simple future in the Greek.
In Philippians 2:9-11 Paul says it in a somewhat different way:
Therefore God has highly exalted him and bestowed on him the name that is above every name, so that at the name of Jesus every knee should bow, in heaven and on earth and under the earth, and every tongue confess that Jesus Christ is Lord, to the glory of God the Father.
Here Paul is saying that God had highly exalted Jesus with a purpose in mind. That purpose was that every knee should bow (read “would bow” if you don’t use or understand English subjunctives) and every tongue confess that Jesus Christ is Lord.