Arnwolf666
Adventurer
First. Strahd and barovia are great.Barovaria is the single worst, most boring Ravenloft setting, Starhd is a 2 dimensional Dracula clone, there are more interesting Ravenloft Domains. A lot of them. I like the one with Doppelgangers for example. But I agree I don't think it will be Ravenloft, because Perkin does adventures not setting books.
I don't think it will be a Dragonlance AP because you want a Setting guide out first. Plus that is too big a AP for just one book.
DoD on the other hand is an adventure in the Forgotten Realms. It won the same contest Saltmarsh did the year before. D&D 5e doesn't have a major desert themed adventure yet. It's widely believed to be one of the best adventures in D&D, and the first game product for the Forgotten Realms.
The only thing is is that because the original is already canon, I'm leaning on this being a sequel rather then an update, but I could be mistaken and they find away to get around that issue.
Second. Everyone should play the module “Hour of the Knife”. It is set in the domain Zherisia in the city of Paridon. PAridon is basically Victorian London or very similar.