Certains ont pu déjà lire le roman dark imperium et visiblement deux nouvelles unités de primaris sont présentées:
A Reiver Squad is a close combat Primaris Space Marine unit, that wears skull faced helms and is equipped with silent power armour, that has been adapted for stealth work. They wield combat knives, power swords and heavy bolt pistols and have had their left pauldrons enlarged, in order to provide them with better protection in melee combat.
An Aggressor Squad is a Primaris Space Marine unit, that is equipped with shoulder mounted missle racks, that are reloaded from internal armour stores located within the Agressors’ Gravis power armour. They also wield Flame Gauntlets, that billow forth burning promethium.