The thing about a non-disclosure agreement is that anyone who does know can't legally say anything.
All Adobe have said is that they are working on it. No news about timeframe or features. However, a patch or upgrade for 11.5 is expected - perhaps shortly. It will add AS3 support, cloth physics and a few other things. Whether it is branded as D12 when released is (again) unknown.
After the 11.5 update, I hope the next great new is Adobe lay off Partridge and they put a better communicator, Partridge has not a credibility to do this job.