From a literary perspective, there is no intertestamental gap between the Testaments. The last word in the Hebrew Bible can also be understood as the first word in the NT. It is a verb without a subject ( וְיָֽעַל
2 Chr 36:23, "let him go up"). Its subject could very well be taken from the first chapter of Matthew in the NT. It is a call for the coming of that one "whose God is with him," and who is to build the Temple in Jerusalem. In Chronicles (and the post-exilic prophets) this one is the messianic (priestly) son of David. Matthew's Gospel, which follows immediately after this last word, begins like Chronicles, with a genealogy identifying Jesus as the Christ (Messiah), the son of David, who is Emanuel, "God with us."
The Messiah and the Hebrew Bible
John Sailhamer, Southeastern Baptist Theological Seminary
Journal of the Evangelical Society 44:1 (March 2001)