Looks like Roundabout will just have 2 Broadway plays for the 17-18 season (Travesties, Time and the Conways) since Children of a Lesser God is renting Studio 54 in the spring after "Latin History". Maybe they have a summer production planned for part of their 17-18 subscription season (like Marvin's Room is part of last year's subscription) or something good lined up for the Pels?
(I had heard they were transferring a revival of a play that premiered at a regional theatre more than a year ago, featuring a "star", but maybe it fell through.)