FUNimation Entertainment has announced that it will stream the Attack on Titan The Final Season anime with English subtitles and an English dub. The English-subtitled version will be available in the United States, Canada, the United Kingdom, and Ireland on the same day it premieres in Japan. The series will also stream in Brazil and Mexico, and the SimulDub will premiere later.
A special preview video after the final episode of the third season had announced in June 2019 that the final season would premiere in Fall 2020. However, the official website does not list a specific premiere season, but lists only that the show will air on NHK-General.
Source: ANN