For the STD/Darkoath/Everchosen battletome release, i feel like they would release that when all 6 warcry warband have been release and i think there would only be 4 playable at launch (based on how their release schedule was for shadespire and Nightvault). so it could still be a ways off.
admittedly there is a lot of 40k releases on the horizon, Renegade Knights, Apocalpyse game, Primaris tank, AD mech transport, Iron Hand Character, Blackstone fortress, it probably fills up the next 2 month pretty well