http://www.fantasyflightgames.com/edge_news.asp?eidn=3364
"Foundations of Stone is now available".
Some more card images here.
The Treachery card appears to read something like: "Each player chooses and shuffles one hero he controls into his deck. When he draws that hero, he puts it into play."
This raises two rules questions in my mind:
1. What happens if the shuffled hero gets into your hand by a mechanism other than "drawing" (eg Gandalf's Search)? By strict reading, you couldn't then put the hero into play. (the AGOT card game, I believe, maintains a careful distinction between drawing a card and putting a card into your hand).
2. What happens if the hero gets attached to a Nameless Thing? Does the hero's "threat cost" count towards the Nameless Thing's stats? (I think not, as the rules do distinguish quite clearly between "cost" and "threat cost" - "cost is not found on hero cards")