Luke Cage during the 70s used the tagline "Sweet Christmas" in nearly every book. Feelings on the tagline are mixed with some people finding it too silly, and other fans love it. In recent years, Luke Cage's stories became darker and grittier. With the change of tone, "Sweet Christmas" has become more scarce but it still crops up from time to time. Some questioned whether the line would appear in the serious, dark toned, Jessica Jones or Luke Cage Netflix series. Based off a recent interview with Mike Colter who plays Luke Cage it sounds like the line will definitely appear in the TV shows.
Mike Colter said the famous Sweet Christmas line during an interview at NYCC. You can listen to that hear:
Pictures of Luke Cage saying Sweet Christmas!
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