Just wanted to post a few things the author of the novel ( James Swallow) mentioned.
1) there will be word bearers in novel.
2) the Red Angel will be explored.
3) Amit, founder of the flesh tearers, plays an important role in novel. as well as other successor characters.
4) the story will cross many worlds in the Signus cluster besides Signus Prime
5) Roldoron will also play a major role.
6) The BA libarians will have plenty to do in the novel.
I cant wait for this novel.