I mean, it's not how it usually goes...
Back in the day, the closest expansion/raid releases we had for Christmas were:
* Barely near the holidays. - Wrath of the Lich King: November 14, 2008 - Raids opened the same day.
Warlords of Draenor: November 13, 2014 - Highmaul opened on December 2, 2014.
Cataclysm: December 7, 2010 - Raids opened the same day.
Shadowlands: November 23, 2020 - Castle Nathria opened on December 8, 2020.
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If Blizzard releases Dragonflight on November 28, 2022, and gives us the usual 14-days off-season, the Raid will be opened on December 13, 2022, and Mythic on December 20, 2022, these dates are insane and never before we had a raid release so close to the holiday season. Would be a lot better if the expansion could be released on December 7/8, or 12/13, and the first Season on January 3, 2023.