Yep. A national shutdown looks like it has to happen at this point. I don't see this issue being resolved soon enough for the season to start. Right now we can't have groups of more than 10 so stadiums full of 60 to 100k people seems unlikely.
Even if they play in empty stadiums, that's still a lot of people. All the players, coaches, medical and supports staffs, TV people, refs, etc.