Luke's collections of sayings does not correct the old, but the new law of love in the Kingdom is equally revolutionary. Here are some interpretative models. Once the bearer of the good news Himself has come on the scene, John's message loses its importance. The Kingdom is the continuing reign of the Messiah. In that sense, a prophet however great, can never be identified with that Kingdom.
Many interpreters view the inauguration of the Kingdom as still in the future.
The Jewish day at that time went from sundown to sundown. The family Passover ritual the next evening required the family to stay in all night after the Passover meal, so going out to the Garden of Gethsemane would be unthinkable. The Rabbi would rehearse the meaning of the ritual, so the disciples could explain it to their families the next day. There is no way thirteen men could celebrate a Passover meal. This would mean that Luke believed, as did Mark, Matthew, and John that Jesus died at the same time as the Passover Lambs were being sacrificed for each family in Jerusalem.