I was surprised by this announcment. The last cancellation announcement said cruises (on the Dream and Fantasy, at least) were cancelled until the middle of June, and now they're cancelled until the end of July. I knew Disney would extend the cancellations, but I didn't think they would go until almost August. Disney is taking no chances with this virus.
Hopefully Disney won't have to extend the cancellations even more, but it's possible. As you likely know by now, these cruise cancellations will be extended past July 27th if necessary. Be sure to check the Disney Cruise Line website for more information and the latest updates.