Let's make DUTCHMAN'S CREEK in 5e!

Do you like horror stories about giant monsters? What about the most giant monster--the most immense thing in existence? Want to play an adventure featuring *that*? Then check out this video!
John Langan's "The Fisherman" (2016) is not only a captivating and beautifully horrific novel; it also contains a tale of terror, which we'll adapt--and hopefully not butcher--for a Ravenloft Domain and accompanying adventure!