Reddit says Feb 2022 which is still almost 6 months off.
According to my PIMO friend it was announced this week that 4000 Bethelites were allowed to travel home for visits recently. I believe he indicated that they were quarantines upon their return, but despite all being vaccinated, 4 tested POS for Covid.
If they are testing the water with Bethelites, I certainly could see them opening Assem Halls, at least in "safe" areas that are allowing such gatherings. I think even JWs must be confused when you can attend a funeral service at the funeral home or church for a "worldly" relative but JW funerals (at least here) are still only on Zoom.
Additionally, as one person commented, Circuit Assemblies are HUGE CASH COWS for WTS because they dictate how much will be contributed. (And it's a lot!)