Many movies on Christmas themes have been made for television and the cinema over the years, including literally dozens of adaptations - albeit sometimes rather loose - of Charles Dickens' A Christmas Carol.  One film that has not yet been made, however, is:

The Internet Movie Database lists hundreds of movies with "Christmas" in the title.  Amongst those you may not yet have seen: A Messy Christmas (1921), An All Dogs Christmas Carol (1998), Goat Christmas (1997) and The Bad Man's Christmas Gift (1910).