The Disney Parks Blog announced that the park hopper option will return to Walt Disney World beginning January 1, 2021.
Guests with a valid annual pass or a park hopper ticket must still make a park reservation for the first park that they intend to visit that day. Once the guest has visited the first park for the day they can hop to any park without a reservation after 2 PM.
Both the 2 PM park hop time and the need for a reservation for the second park are subject to change. Guests can refer to DisneyWorld.com/ParkHours.