More info on future HH releases has come out of the Weekender, and it appears that while we are done with Calth, Prospero has yet to be finished.
Bell of Lost Souls said:
New stories from Black Library soon for Space Wolves.
Gav Thorpe is working on an audio called The 13th Wolf. Different side of Prospero Burns this time.
Chris Wraight working on book on Leman Russ and Space Wolves during the Heresy. Involving one or maybe more Primarchs. Including some he has not got on with……
Graham McNeill nearly done with Crimson King! Also working on more Magnus based stories.
Possible stories furthering the Thousand Sons that weren’t on Prospero.
I'm quite pleased by this as I have always felt the big battles, Calth, Signus, Prospero, Tallarn, etc; all deserve to have more focus on them than a single novel. Calth got an anthology, and now Prospero is getting a bunch of extra stories. Now we just need some Signus tales and for Tallarn to get a real novel.