Games Workshop released the above trailer teasing something new from Forgeworld in Winter 2014, The Horus Heresy Conquest.

The Horus Heresy Conquest is book four in their series covering the titanic war and covers the Battles of the Cyclops Cluster, Siege of Mezoa, Conquest of Manachea, and Defense of Agathon.

As far as armies covered, the book includes Sons of Horus, Death Guard, Iron Hands, Salamders, Imperial Fists, Mechanicum, Dark Mechanicum, Solar Auxilia, Knights, and Titan Legions.