If they were planning on continuing the show without Groban and co, I feel like we would’ve gotten the new cast announcement by now. For comparison, the recent Hello, Dolly! revival announced Bernadette Peters(and Victor Garber) on September 05, 2017 when they weren’t due to start until January 20, 2018. Perhaps it’s apples and oranges, but when you are dealing with a massive start like Groban it’s hard to recast and it becomes even more difficult closer to their official end date.
My father (AIDS)
My sister (AIDS)
My uncle and my cousin and her best friend (AIDS, AIDS, AIDS)
The gays and the straights
And the white and the spades