So Sisters rumors have started which makes me excited and apprehensive all at once (which I think is fair considering the last time we had rumors a sub-par digital only codex was released). That said please take with liberal amounts of salt.
From Bolter and Chainsword:
Originally Posted by Ishagu
A Hardback Sororitas Codex with plastic kits. I was told something similar by someone in the know not long ago. It could be true...
Originally Posted by Sephillion
I’ve heard more credible things about Sisters being later (next year), and the fact that they would redo Dark Angels, CSM and Daemons so soon… instead of redoing the problem Codices… seems like whoever wrote this just assumed GW would follow the same order.
Pulled from Dakka:
With earlier rumors of a potential Adepta Sororitas codex release on the schedule, I was asking a few questions. Here is a response to the status of a Sister's of Battle release.
Please remember that these are rumors
Via Steve the Warboss
After the featuring in the Shields of Baal Campaign i think its possible for a near Sororitas release. The Codex is complete and can be released every time. More rumors do not exist at the moment.
There are rumors for an khorne theme suppliment in march, maybe the first with new profiles. The release of an new Codex in the summer is still possible
And the speculated release scheduled puts them as a "late May"
From Jared van Kell on BoLS (take extra salt):
Adeptus Sororitas are due this year but from what is being said it sounds like it is going to be as part of a box set similar to Shield of Baal.
From Hellios on Bolter and Chainsword:
I can 100% confirm that GW has newer SoB infantry sculpts. What I can't comment on is if GW has plans to release those sculpts. I use the word 'newer' because I consider them to be fairly old now.
If GW is going to start releasing small forces (FW AdMech has been selling well?), it would be a good time to drop some new SoBs. Even if plastic SoBs weren't cheaper, they can provide a lot of bits on a sprue. Celestians, Dominions, Retributors, and normal sisters in one box. Seraphim in another... HQ box/clamshell that fits well with the new plastics... And 'pure' SoB are fine, maybe a Repressor if they feel like pushing the boat out.
And some speculation from the comments on Faeit that I think makes sense (based on rumors of releases) by Chris Royles:
GW are simply responding to mArket and competitor risk.
GW Knights = Dreamforge Leviathon
GW Greater Deamon = Creature Caster
GW SoB = Raging Heroes Sisters if Mercy.
Timing is far too coincidental.
GW cannot afford for any one of the above to gain market share and do a better job.
And that's where we sit until more comes out or until someone can get the Devs to drop hints, or all the above.