"This year’s General’s Handbook also contains allegiance abilities for several factions, with expanded rules for Ironjawz, Seraphon, Wanderers, Darkling Covens, Free Peoples, Slaves to Darkness and Dispossessed. If you’re looking to make the most of these forces in your games, the book is a must-have."
Seems that BT for Dispossesed is not yet that soon as some might have thought.