That fool is just enjoying his royalties from Spelling Bee and Make Me a Song. When he gets bored, he'll come out with something new. He's not going anywhere :)
Bill Finn is a busy man. Between work on The Royal Family of Broadway, some cartoon work, a couple of other projects, and his teaching at Tisch, I don't think anyone need worry about Bill being bored.
He runs a professional summer theatre company in Massachusetts. The Barrington Stage Company.
It's where shows like "The Burnt Part Boys" (was scheduled to come to Broadway last year) get their start. It's a place for new composers and fresh actors. Finn acts as a guide and mentor.
Kirsten (or Kristen?) Childs, the writer of "Bubbly Black Girl Sheds Her Chamelion Skin", usually premieres one of her new musicals there every summer.
There's 3 - 4 musicals put up every summer. It keeps Finn busy enough.
"The Royal Family of Broadway" has apparently been shelved. Steve Suskin's On the Record column reviewing the Make Me a Song album mentions rights problems but doesn't say anything more than that. Too bad; I loved everything I'd heard from it.