As with other DLC Content, please add a DLC Selection of Horus Heresy Shoulder markings, so we can play Loyalist legionaires of the fallen Chaos factions.  This shows up in Lore.  Founding members of the Grey Knights and Deathwatch were Loyalist Chaos Legionnaires.  JANUS, a Thousand Son, became the Founding leader of the Grey Knights, for example.