Reading something by Doug Chaplin on preaching the Christmas stories from Matthew and Luke (worth a look here) reminds me of a point.
My point is this, the church has a calendar, and when followed the Wise Men (i.e. Matthew 2:1-12) should be centre of attention at Epiphany (6th January). Not before. No posters, banners, or other depictions of the Wise Men before 6th January please.
An exception might be a Christmas pageant service in mid-December as the wash up for the Sunday School's year in which a whole narrative of the birth of Jesus is told.
The great advantage of holding back the Wise Men for Epiphany is that the joys and glories of Christmas are extended for greater enjoyment.