No scripture is discarded. They are understood in light of the ending of a covenant, and the beginning of another. I would simply ask you or anyone else to compare the books of Deuteronomy and Revelation. One initiates the old covenant, and the other brings it to an end. They have the exact same outline, and deal with the same thing.
Also consider, every prophesy finds its fulfillment in Christ. Though many were dual prophesies finding OT fulfillment, all find their ultimate fulfillment in Christ.
I'm more than willing to work through the scriptures and biblical history, specifically redemptive history, and show this to be the plan all along. But most of the objections I find are simply those which are so ingrained from years of acceptance and an unwillingness to receive anything else.