Upcoming Horus Heresy
Vengeance by John French – this will focus on First Captain Sigismund of the Imperial Fists, as he has to deal with a group of Word Bearers stranded in the Sol system.
Limited Edition Novellas
Cybernetica by Rob Sanders – a story about loyalist resistance to the Dark Mechanicum forces controlling Mars.
Shattered Legions anthology by various authors – this focuses on the three legions shattered during the dropsite massacre – the Salamanders, Iron Hands and Raven Guard – and their response and actions after the incident on Istvaan V.
The Silent War anthology by various authors – this covers the war in the shadows, and may involve the Sigillite, assassins, and the psychological warfare aspect. No real details, but I expect to see the Alpha Legion feature heavily for the traitors.