Very little info still. Cyanide has made some very good (imo) management games (rugby, cycling), and some real rubbish (Loki).
I don't know what to expect of this one.
The world is interesting, though. There is very little magic, but there is some: Undead in the North, Dragons, Magic assassinations (Fire magic).
I love the setting.
The game should focus on backstabbing diplomacy along with battles, and underhanded manipulation and intrigue to be true to the books. Battles are rather secondary, as a good (or bad) marriage can lead to a good assassination and ruin successful wars in a pinch.