10 day release window? Dude, you need to chill and think before you post.
Winter lasts for 3 months. Therefore, Winter 2020 runs from 21st Dec 2020 to 20th Mar 2021. Just because they started selling the season pass in Fall of 2019 doesn't mean that Part 1 was complete and Part 2 nearly finished. Why would it make you think Part 2 was nearly finished? It's project development, they have a timeline for development, which they provided you with by saying Winter 2020.