The Tail Section

The source that accurately spoiled the recent gruesomness in the hatch has this to say about the mysterious new Dharma symbol:

The station is called "The Door" and the big reveal takes place inside.  Nobody knows for sure what that is yet, (give me another couple of days), but with a name like "The Door" I’m sure your visitors can put something together.

Note that it is different from the symbols.  It has breaks in the outer shape.  Not a solid octagon.  Those lines connect directly to the corners of "The Door:"  All of this is important, doubt.