FlatFace has been operating since 2003 out of Dracut, Massachusetts, and the way the brand grew explains why a returning deck line gets a video of its own rather than a line in a newsletter. It started with grip tape and expanded outward into decks and the G-series bearing wheels, and by the shop's own account it was the first US distributor of Blackriver ramps. It also keeps a museum of historic gear, which tells you something about how the people running it think about their own back catalog: old product is not just stock that didn't sell, it is a record.
That is the context a word like "back" is doing work inside. A returning line from a shop that archives its own history is being positioned as a reissue, not a new SKU. The announcement stops short of saying whether the returning December Decks match the originals in shape, mold or construction, and that is the question that will decide how the line is received by anyone who rode the first ones.
Until the product pages carry specs, the honest read is this: FlatFace has told the scene a name is coming back, on a date, and has left the object itself to speak on arrival.