Welcome to the Disney Parks Moms Panel, Ellen!  We are so glad you brought your question to us.
As Walt Disney World Resort begins the process of 
reopening, due to 
enhanced health and safety measures capacity will be limited.  Attendance will be managed with the new 
Disney Park Pass system.  In order to make a theme park reservation, valid admission is required.   Because theme park reservations will be limited, new ticket sales have been temporarily paused to focus on Guests who have already purchased admission.
Sales of 2020 tickets will resume, based on theme park capacity and reservation availability, later this summer.  At this time, we do not have a more specific timeframe of when ticket sales might resume.
Over the past few weeks, there have been many announcements and 
updates about 
Returning to a World of Magic.  I will keep my fingers crossed that perhaps we might hear something soon about when tickets for dates in 2020 will once again be available for purchase.  In the meantime, keep your eye on the 
Disney Parks Blog for any announcements, and also feel free to check back with the Moms Panel again to see if we have any updates.  We are always happy to help, so send any additional questions you might have our way.
Anne Marie