New York, similar to other states, has a four stage reopening process. Movie theatres, entertainment venues, etc will be in phase 4. Currently, no area in New York is ready for phase 4, and a few areas are in phase 3. Even if Broadway would be cleared to open, that doesn't mean that they will. The producers, Actor's Equity, Broadway League and theatre owners won't unless it is safe for the cast, crew, and audience members.
I understand wanting Broadway to reopen, truly I do. However it is not going to be a quick process, nor is there any guarantee that any of the upcoming shows (including Music Man) are going to open after the closure. Those in New York have worked hard to decrease and flatten the curve, and as a whole country we are just getting through what appears to be the first of two waves. There is a long way to go before theatre will be open, and no guarantee Spring 2021 will be the date. When Broadway does reopen it will take weeks of preparation with the need to redo the tech, sound, update costume fittings, potential re-castings, set building and tear down etc. Personally January 2021 is the absolute earliest they will begin reopening and I don't really see it opening prior to that.