I’ve heard it said that even people pretty close to Rich only find out about new stuff after the fact. The best you can do is watch the repo, keep an eye on the mailing list, or maybe talk to Cognitect people in person when you get the chance.
And speculate. Nothing wrong with that 
How about we turn this into some release notes fanfic? What would clojure 1.10 look like in your wildest dreams?