http://www.fantasyflightgames.com/edge_news.asp?eidn=5361
Looks like the focus is investigation this time around. Which is good.
Sounds like there will be some sort of mechanical framework for GMs to plan investigations. Despite the statement to the contrary in the opening of this article, I don't really see how a formal mechanical framework can work in DH2 and not be a kludgey mess, but we'll see, I guess.
If nothing else, looks like this is going to be the Ordo Hereticus book. I do have to give FFG props for saving the best for first.