Yes, the believer is predestined for adoption.
Yes, the future redemption of the body is one aspect of adoption.
Yes, the moment a person calls on the Lord, he or she is justified.
But call comes before faith and predesination comes before call. Romans 8:30 gives the chain in its logical order. Predestined, called, justified, glorified.
Or we all can agree to disagree on this point.