I'm still writing new material (continuity and character/story development stuff) and trying to work out what should go where. I've read the reviews of Bane of Souls (thanks to the delightful fellows who wrote them, and to the splendid chaps who write reviews generally) and will hopefully address any potential weak spots raised there in Altmortis. There shouldn't be any real gaps in knowledge (this happened in Bane of Souls necessarily, as mystery was at the heart of the story), although there are a few plot twists. The start has yet to be set in stone, but in the early chapters there's one in particular which I really rather like and wiill hopefully get the reader nice and interested .
I have been writing regularly, and hope to get most of the new bits written by the end of this month, but that depends on how easy/hard the writing turns out to be. After that I'll check and redraft the extra bits, then improve them and insert them into the main story, and then check that to see how it flows.