The scriptures are about one story and one overarching Person. Jesus Christ. It is not about men, or specific nations or races or earthly boundaries or physical enemies. Christ can be seen in every book in the Bible and Hebrews is an excellent book for summing things up.
Heb 8:1 Now of the things which we have spoken THIS IS THE SUM: We have such an high priest, who is set on the right hand of the throne of the Majesty IN THE HEAVENS;
Heb 8:2 A minister of the sanctuary, and of the TRUE TABERNACLE, which the Lord pitched, AND NOT MAN.
Heb 8:4 FOR IF HE WERE ON EARTH he should not be a priest, seeing that there are priests that offer gifts according to the law:
Heb 8:5 Who serve unto the example AND SHADOW OF HEAVENLY THINGS, as Moses was admonished of God when he was about to make the tabernacle: for, See, saith he, that thou make all things according to the pattern shewed to thee in the mount.
Heb 8:8 For finding fault with them, he saith, Behold, the days come, saith the Lord, when I WILL MAKE A NEW COVENANT with the house of Israel and with the house of Judah:
Heb 8:9 NOT ACCORDING TO THE COVENANT THAT I MADE WITH THEIR FATHERS in the day when I took them by the hand to lead them out of the land of Egypt; because they continued not in my covenant, AND I REGARDED THEM NOT, saith the Lord.
Heb 8:13 In that he saith, A new covenant, HE HATH MADE THE FIRST OLD. Now that which decayeth and waxeth old IS READY TO VANISH AWAY.
This is New Covenant Theology. I don't know what this "New Covenant Theology" belief system you speak of is all about, but if you go by it's name, it should mirror the scriptures. If you have a link, I would like to investigate it.
If it doesn't support Jesus Christ being the SUM of ALL THINGS and the Better EVERYTHING of Hebrews, then it's not really New Covenant Theology.
Jesus is "so much better than the angels" Heb 1:4
Jesus is "the better hope" Heb 7:19
Jesus is "our surety of a better testament" Heb 7:22
Jesus is the "mediator of a better covenant"
based on "better promises" Heb 8:6
Jesus is the "better sacrifice" Heb 9:23
A lot of people don't seem to want to talk about heavenly realities, even though the NT scriptures immerse us in scriptures about heavenly realities.
"It was therefore necessary that the patterns of things in the heavens should be purified with these; but the HEAVENLY THINGS themselves with better sacrifices than these." Heb 9:23
Jesus is our "better and an enduring substance" in heaven. Heb 10:34
"For ye had compassion of me in my bonds, and took joyfully the spoiling of your goods, knowing in yourselves that YE HAVE IN HEAVEN a better and enduring substance."
In Jesus, we have a "better country, that is, an heavenly", not earthly. Heb 11:16
Jesus is the "BETTER THING" for us. Heb 11:40
"God having provided some BETTER THING for us, that they without us should not be made perfect. Heb 11:40
"And to Jesus the mediator of the new covenant, and to the blood of sprinkling, that speaketh BETTER THINGS than that of Abel." Heb 12:24
Jim Fowler has a interesting take on Dispensational and "Covenant Theology (below).
What does Dispensational Theology believe?
Recognizes the discontinuity of the Mosaic covenant of Law. Also creates discontinuity in the Abrahamic covenant of promise by insisting on yet unfulfilled physical fulfillment, positing interrupted and postponed fulfillment to be realized in future at second coming. Fears that continuity in spiritual fulfillment of Abrahamic promises would impinge on God’s faithfulness, thus fixing God in physical preoccupation. This has led to regarding the Church as a parenthetical interim afterthought in God’s plan, letting the Gentiles partake of the benefits of Christ until the time that Christ returns to restore physical Israel. Eschatologically expressed in premillennial pessimism."
"What does Covenant Theology believe?
Recognizes the continuity of Abrahamic covenant of promise in spiritual fulfillment of Christ and Christians. Also posits partial continuity of Mosaic covenant of Law, denying ceremonial, civil, and sacrificial laws, but advocating renewed continuation of moral, behavioral obligations of law. Fear that discontinuity of old and new covenants might impinge on God’s immutability, thus fixing God in mechanistic proceduralism. This view of continued Law has led to reconstructionist concepts of theonomy, and the quest to restore God’s Law as the “law of the land.” Covenant theology is usually eschatologically expressed in postmillennial optimism."
The problem with both of these views is they necessarily believe that ALL the promises to Abraham are not fulfilled in Christ when the NT actually teaches that the promises to Abraham are all fulfilled IN CHRIST.
Do you see the problem with any theology that nullifies the belief that ALL the promises to Abraham are now fulfilled in Christ?
Gal 3:26 For YE ARE ALL(Jew and Gentile) the children of God by faith in Christ Jesus.
Gal 3:27 For as many of you as have been baptized into Christ have put on Christ.
Gal 3:28 There is neither Jew nor Greek, there is neither bond nor free, there is neither male nor female: for YE ARE ALL ONE IN CHRIST JESUS.
Gal 3:29 And if ye be Christ's, then are ye Abraham's seed, and heirs according to the promise.
Do we need anything more than Christ who is available NOW to all men?