Yeah, that looks like Icewind Dale. Definitely not what I wanted, but I'm sure they'll write something good.
Weirdly, a few D&D YouTubers on lore have released videos recently with the Crystal Shard (an item closely tied to Icewind) as the subject. Could be a coincidence, but maybe they hear stuff in the pipeline.
There are still some loose end villains from the Crystal Shard plotline. Crenshinibon, the Crystal Shard, was destroyed, but the 7 liches who were part of it were released. The remnants of the shard also merged with a red dragon and mind flayer to form the Ghost King, some strange Shadowfel entity.
Could be entirely separate from those and entirely new, or maybe revisit those threads.