The reading in place of the Epistle is explicit in its prophecy. And the Gospel reading goes well with it, and goes further with the point we found in last week’s readings. In stupidly simple terms, nobody is going to stand in God’s way.
Since Joseph had no more trust in Herod’s son Archelaus than in Herod, he made use of the same gap in jurisdictions that would figure much later in Jesus’ trial. Joseph went to Galilee and to Nazareth, fulfilling yet another prophecy.