Mount Sion in Hebrews:12 is the angels new heaven, it is also where the Great White Throne event takes place. God and the Holy Spirit are in Ge: as the model for Adam and Eve being created as man and woman in a married state. Christ's witness of creation is in Proverbs:8.

This is a contract between Christ and God.
1Co:15:27:
For he hath put all things under his feet.
But when he saith all things are put under him,
it is manifest that he is excepted,
which did put all things under him.