Dark Vengeance is now a thing of the past. Its a great set and you get a lot of models for your money. The one set of models in there that is a probably most popular, is the cultists. They are a new unit for Chaos Space Marines, and we do not yet have any rules for them besides stat lines. (its mostly points etc that we are missing).
This brief rumor mentions the retail box set.
Please remember that this is a rumor, and appears to be more speculation than actual rumor considering where the bit of information comes from.
via Faeit 212 inbox (anonymous)
I over heard the store manager mention Cultist Boxes being released soon and priced between £18 and £20 about the same as Cadian Shock troops.