That's what I was thinking, perhaps with a return to Mordentshire, but not focused on a body switching Jekyll and Hyde machine. Although you could suggest the device where players switch between a character in the new adventure and a character in CoS whenever they take a long rest as an option. I don't recall the original adventure mentioned why it was called Gryphon Hill (I assume it was a meta reference to Griffin, AKA the Invisible Man). Although with the de Toro Frankenstein doing the rounds, maybe a return to Lamordia would be in order? Curse of Mordenhiem also works as a title. Perhaps even more directly calls out Hammer.Yeah, I would just take the Gryphon Hill name and make a new adventure. Van Richten's had a ton of settings that demanded to be played in, and coming up with a new adventure -- or even a whole anthology of them -- wouldn't be hard.
I don't kid - I think they are going there.Dark Sun! I kid, I kid.
Honestly they already did a great Isle of Dread with Tomb of Annihilation. Which is a better version of Isle of Dread than the original.Heroes of The Isle of Dread Expert Set
- Ye Olde Adventure Compendium (including Night's Dark Terror, Ghost Tower of Iverness, D1-D2 Descent into the Depths, D3 Vault of the Drow, Q1 Queen of the Demonwebs).
Castle Amber.Seriously though what haven’t they rebooted that was popular. Or at least held people’s attention.
I’d also look towards classic video games.
H*ck even a full on Baldur’s Gate thing, even now, might be smart.
I think the adventure anthology will center around the World Tree.