Well mabe it's hinting to either a future codex or a new starter box? If they are gonna release a new DA book they'll most likely have the realease date the same saturday as the final issue of white dwarf, so the first saturday in december (or near as damn it), if DA are rumoured to be the 6th ed release then the possibility of a starter box that includes DA may be realeased on this day, mabe a dark angels versus chaos space marines possibility? We may get half way through the sides of white dwarfs and the picture may be split down the middle, showing a heretical side to the dark angels, or fallen angels in black armour? possiblt a cypher picture? This is all just speculation and my ideas.
"Hate is able to provoke disorders, to ruin a social organization, to cast a country into a period of bloody revolutions; but it produces nothing. "