There was an all-staff call today where a few things were disclosed.

1. They are preparing to be able to hold BM 2021.
2. However, the decision looks unlikely to be made before Feb at the earliest.
3. April sounds like the point at which pressure ramps up to make a go/no-go call.
4. There was talk of various possible Covid mitigation measures, from references to testing to social distancing to hand washing/sanitation and so on, but it all depends on where America and the world stands in the spring, Covid-wise.

via Dr. Yes on Reddit