For the Horus Heresy we are getting Emperor's Children Upgrade packs. Here they are to take a look at them.
The Sons of Horus Mark VI shoulder pads and heads upgrade packs are already available, and the Iron Warriors have their own upgrades on the way. It’s now time to take a look at the next batch of accoutrements coming for the Traitor Legions, in the form of upgrade sets for the inimitable III Legion. -WarCom