The Fandom Post is reporting that Netflix will be begin streaming the first 12 episodes of the Sword Art Online: Alicization anime on October 1, 2020. Language options will be announced at a later date. It will be listed as season three on their site when it goes live.
Manabu Ono is directing the series and A-1 Pictures is handling the animation production. Gou Suzuki, Tomoya Nishiguchi, and Shingo Adachi are handling the character designs.
Source: The Fandom Post