Disneyland is planning a phased reopen their theme parks beginning July 17th, 2020.
Via the Disneyland website,
Pending state and local government approvals, Disney’s Grand Californian Hotel & Spa and Disney’s Paradise Pier Hotel plan to reopen on July 23rd, and Disneyland park and Disney California Adventure park will plan to reopen on July 17th. Additionally, Downtown Disney District will begin reopening on July 9.
Disneyland Resort will manage attendance through a new theme park reservation system that will require all guests, including Annual Passholders, to obtain a reservation for park entry in advance. Theme park reservations will be subject to availability.
Certain experiences that draw large group gatherings – such as parades and nighttime spectaculars – will return at a later date. While character meet and greets will be temporarily unavailable, characters will be in the parks in new ways to entertain and delight guests.
For all information regarding the reopening & ticket info head to Disney's website here