And as I posted above, Spider-Man's move forced Doctor Strange 2 to move. Also, Warner Brothers is doubling down on it's July 17th date for Tenet as of now. The only major movie to release within a month of that is Mulan a week later (tentatively). If they truly hold fort on that date, it might not be the worst idea as it would be the only new movie in theaters, so it could play on virtually every screen in to both 1. Safely social distance in public and 2. Still make a lot of money with it being on every screen.
In a way, WB taking a risk with Tenet (if it pays off) could help to kickstart the theater industry much faster than it otherwise would and get audiences comfortable with going out again. It could literally save an industry in some ways.
There are 15 minute tests that are out there, although in very limited supply. I know to get one around this area, you have to actually pay for the test - it's not the free test that takes about a week. Those 15 minute tests are currently not at all feasible for mass use at theme parks, concerts, etc.