I'm sure you know - but since it's in the title - November is already available. As for December, here are the release dates the last 4 years, copied directly from Mousesavers (so all credit to them for this list):
2024 Walt Disney World resort room rates were released May 31, 2023.
2023 Walt Disney World resort room rates were released June 8, 2022.
2022 Walt Disney World resort room rates were released June 23, 2021.
2021 Walt Disney World resort room rates were released June 24, 2020.
2020 Walt Disney World resort room rates were released June 18, 2019.
November 2025 is NOT bookable for the resort hotels unless you start with an October date. Picking a week in November by itself is not available yet. False information