Both seem intent on exploring other options right now. Leslie has just finished filming Murder on the Orient Express in London and of course released an album. His wife is also pregnant. Cynthia has I think 3 movies that she has yet to film.
There were some rumblings a while back that Leslie (and Renee) were looking at retiring from the stage. I know Hamilton was super taxing physically, I don't blame him for taking a good long break. Especially considering he just became a dad, and is getting royalties from Hamilton.
I do think we'll see Leslie back in some capacity, but it'll definitely be on his terms and probably not anytime soon.