Courtesy of Kroothawk, Dakkadakka, Warseer, and Valaraukar.
Quote from Valarauker's post on Warseer (& copied from Kroothawk's post on Dakkadakka.)
I also spoke to some of the staff who mentioned that there would be more releases toward the end of April including the empire state troop conversion kits and that the book was now looking to be ready around June / July. This will now be a stand alone volume not a series sadly with a 2nd planned but unrelated book after this of Bretonnians vs. Tomb Kings with more planned beyond this that they can't talk about yet. I'm sure there was more if anyone has any specific questions I'll try to recall more.
That reminds me, Alan Bligh the author of the new Tamurkhan book mentioned that the Chaos Dwarves would have a special character Great Taurus in addition to the standard one and that these would now be constructs powered by bound fire demons. He also said there would a monstrous infantry incarnation of these so giant flame filled suits of animated armour!
Starfyre/Ironmonger: As mentioned above yes it appears these will be in the Tamurkhan book as for now this will be a stand alone volume. Ssadly it would appear rick's grand vision of a multi pronged invasion of the empire is gone which is a real shame IMO as it sounded awesome in scope and vision.
Alan Bligh seemed very enthused though about his reworking of the book and so I hold out hope that it will still be a great piece in it's own right, I get the feeling he was sad about the change of direction too although pleased that he gets to work on it. Gives me hope many of the creative types still around are a good bunch and it's just the whole evil corporate empire which is killing some of their creativity.