I have no expectation that WDW will open July 1st. You should not either. It's just a placeholder... and no sane executive would open WDW in limited capacity, with vastly increased health requirements, during the hottest vacation period in the United States, at a time when fireworks would be an expectation and you can't deliver them.
That is a recipe for total failure, and Disney Parks seldom fails on that level.
Furthermore, when WDW is close to reopening, you'll begin to see things happening more than a month out. There will be significant training periods, furloughs will have to be ended/extended, some contracts renegotiated, etc. At this point, they are letting third party retail and restaurants open at very limited capacity in an outside retail space. We are not at the edge of reopening.