THE TOUGHEST CASE I'VE YET TO FACE: Wicked will fly to film screens on December 20, 2019, so go ahead and start casting. (Not that we haven't tried once or twice before.)
Also, Lin-Manuel Miranda has confirmed -- in addition to his July 9 end-date -- that they will film the current cast of Hamilton before he leaves the show, though whether that will be made publicly available is TBD. Determined, however, is that if you want to see She Loves Me with its revival cast, they'll stream it live online for $9.99 on June 30.
EDITED: Also, how about a Tony Kushner-penned, Spielberg-somehow-involved remake of West Side Story?