There is something of a silver thread that runs through Scripture. It is the ultimate telos of redemptive history. It is this: I will be their God, and they will be my people. And as we continue to read the unfolding of redemptive history, we encounter this covenant statement over and over again: first, with Abraham (Gen 17:1-8), then Israel (Exod 6:7; Lev 26:12), next in Israel’s restoration (Ezek 37:27; Jer 32:38), and even in the new covenant prophecy (Jer 31:33). When we come to the New Testament, we find this covenant statement being applied to the church, the new covenant people of God (2 Cor 6:16) and then in the new heavens and the new earth, the consummation of redemptive history (Rev 21:3).
In light of the above, I’ve come to the conclusion that the prophecy of the valley of the dry bones finds its ultimate fulfillment in the new heavens and the new earth, where all the saints of all ages will be his people and he himself will be with them and be their God (Rev 21-22).