{The king cometh} (ho erchomenos, ho basileus). The
Messianic hopes of the people were now all ablaze with
expectation of immediate realization. A year ago in Galilee he
had frustrated their plans for a revolutionary movement "to take
him by force to make him king" ( Joh 6:15 ). The phrase "the
coming king" like "the coming prophet" ( Joh 6:14  De 18:15 )
expressed the hope of the long-looked-for Messiah. They are
singing from the Hallel in their joy that Jesus at last is making
public proclamation of his Messiahship. {Peace in heaven, and
glory in the highest} (en ouran(9369) eir(886e)(8820)kai doxa en
hupsistois). This language reminds one strongly of the song of
the angels at the birth of Jesus ( Lu 2:14 ).  Mr 11:10  Mt 21:9 
have "Hosannah in the highest."