A couple of years ago (or whenever), when we found out that Heath was preparing to direct a film version of The Queen's Gambit by Walter Tevis, I set up an automatic Google search for that title, to keep watch of any developments.  Turning that book into a film was an excellent, insightful choice for him.  
The results of the search still trickle in, now and then, but Heath hasn't been associated with them anymore.  I still can't seem to be ready to turn off that search.  It was the Heath project I was most excited about. 
 
 