The problem you have with the opening up of the AT is that they have responsibility and the weight of lives lost on their decisions. I don't think you will see the trail open while social distancing is a thing because ultimately they will be putting people in harm's way and they do not want that burden.

At some point when governors open up, they may "open" the trail to daily hiking with a we can't stop you from doing it statement, use all precaution and discourage thru-hiking type activities. I think that is as far as it goes.