Stephen Sondheim's final musical is soon to debut and one can find many conflicting "facts" about it on Ye Olde Internet. It's called Here We Are and it recently started previews at someplace called The Shed in Hudson Yards. I don't know where that is, either.
It opens October 22. Here's an article from the other day about some of the different things that are being said about it including the rumor that it doesn't have very many songs in it and almost none (or maybe none) in Act 2.