Moffat's episode guide on radiotimes
http://www.radiotimes.com/news/2015...xclusive-doctor-who-series-nine-episode-guide
Some thoughts after reading over that:
-So, based on that synopsis, the Zygon story with Osgood does indeed take place after Death in Heaven. I feel vindicated.
-Rigsy seems to have moved from Bristol to London. No, I have nothing further to add, just felt it was worth commenting on.
-The description of episode 12 just feels like a retread of the themes touched on in Dark Water/Death in Heaven.