We've been seeing the leaked models, and for the most part GW has acknowledged the models, but dismissed them in favor of something else. Now we have a whisper of a date that came my way. It's coming soon.
via anonymous sources on Faeit 212
Ahriman will be there on the 22nd of October (not sure if in pre-order or in store).
Previously on Faeit 212
http://natfka.blogspot.com/2016/08/thousand-sons-rumors-answered-by-gw-and.html
http://natfka.blogspot.com/2016/08/thousand-sons-sprue-spotted.html
http://natfka.blogspot.com/2016/08/additional-40k30k-thousand-sons.html