After initially announcing that tickets and hotel reservations would be available "later this summer", Disney has officially opened availability for tickets and hotel reservations through 2020! Previously, bookings were only available for 20201 however after decreasing demand, Disney has opened up availability for 2020. Do note that select dining reservations are also currently available for all guests, and Theme Park reservations still must be booked in advance for all guests in addition to ticket bookings.
Hotel reservations can now be booked using the standard method on disney.go.com/resorts/
Select dining reservations can be made at disneyworld.disney.go.com/dining/#/reservations-accepted
Theme park tickets can be booked at disney.go.com/admission/tickets/
Theme Park reservation availability and bookings can be made at disney.go.com