Parmandur
Book-Friend, he/him
Probably mid-January is when we will see the first announcements outside of the magazine, since Dragon+ seems to stay a bit behind due to the bi-monthly release schedule.
Also, in the "next issue" blurb, they talk about how many of the articles will be inspirational in nature, including the next adventure.
It say this about the next adventure: "One thing's for certain --- it's sure to be inspirational!"
I cannot think of how that would tie into something with the code name "Labyrinth".
Tomb of Horrors ≠ not inspirational, a joke perhaps? Or challenging, or maybe a ghost theme...