Uhm... seeing as how there is already a Game of Thrones game out there (for ps3/xbox, not sure about the later) and it actually was a huge disappointment, not only for me but for everyone I know in rl who bought the game, I am extremely pessimistic about this new one you are talking about. The game I am talking about had a horrible fighting system and a very sub par story line, which was almost a hundred percent made up on their own, with bits and pieces of what actually happened incorporated in.
Defer to the show? Idiots in my opinion. If they want to make a very good Game of Thrones game, they have to stay thousand of miles away from the show, but they're going to defer to it if there is a conflict? Listen, I like the show as much as the next guy but ever since season 2 they've been slowly drifting away from the actual story line. I know, I know, budget issues and all that but come on. If they want to make a kick ass Game of Thrones game they have to completely rely on the books. If they are to lazy to do their research and actually read the series, then this game is already dead in my eyes. If there's going to be a conflict, it's going to be the finished product about how bad it is. Defer to the show... bah!
You said during a mostly unrecorded period of Targaryen reign, does that mean in Westeros or Old Valyria? I would like to play a game as the Targaryens in Old Valyria because I literally know nothing of this land or period of time, and am quite interested in it.