Not sure what the OPs sources were saying at the time he wrote that, but the governor of CA said this back in the end of April:
“The prospect of mass gatherings is negligible at best until we get to herd immunity and we get to a vaccine,” Newsom said. “So large-scale events that bring in hundreds, thousands, tens of thousands of strangers, all together across every conceivable difference, health and otherwise, is not in the cards based upon our current guidelines and current expectations.”
Obviously the government decided to pull back on that stance, but it didn’t look good for Disneyland for a while there. It wasn’t all that far fetched to assume the park wouldn’t open anytime soon.