The conceptual design of uncle mining is already in place.  Now that the fork to CN-Fast is complete, development efforts are going to be channeled towards rolling out uncle mining (slated for Q3 2018). 


Blocktree is the most intricate part of the road map and it will be the lion's share of development focus after uncle mining.  It has a tentative tag for Q1 but I am fairly confident the paper will be in place sometime in January.  It could come sooner also, but I would stick to early Q1 for the whitepaper. 


There has been a lot of malicious activity in the CN space the past couple months, with a variety of attacks hitting small net hash coins.  Now that CN-Fast is live it removes many of the attack vectors that previously existed on CNv7.  This frees up development time, and we're all very excited to get started on the innovative goals of Masari.