You show some signs of understanding when you said this:
From the time of Adam down to Jesus Christ, every prophet on the earth had one priority; to testify of the coming Savior. Regardless of what parts of their record we have today...during their time on the earth...they taught the people of the coming Christ.
The promise of the coming Savior is the scripture that was fulfilled.
That is very true, and Christ came, the prophecy, the scripture was fulfilled.
What you miss, and understandably so, is that when the Word was made flesh, it changed the nature of our relationship with God. It went form a group plan to an individual one, a one on one relationship through his son.
So we ourselves are now a living scripture, a living testament to God's never ending love for his children. it is expressed in word and deed, in a life lived in his love. We no longer need the dictated words passed into us from prophets and sages, we can listen directly. There are other things that can be said about "new scriptures" but that is for another time.
Think again about God's plan, about the very words you said, about a Prophecy fulfilled. God sacrificed his son for us, to feel our pain, bear our burden. It is very simple, a very direct plan for salvation, one that needs no further elaboration. It is understandable that can be hard to grasp, it seems there should indeed be more, more complication, more steps for salvation, something else must be coming that was left out. After all God is a all powerful, (or in the case of your movement, a pretty powerful) entity, certainly things should be more complicated...
But they are not.