“Lots of these plans were noodling around in my head since 2007 or 2008,” he said, “although active development of Book 9 was going on for about a year in advance of Mordor — it sounds like a lot for fifteen minutes of gameplay, I know it, but that’s the curse of the game designer. Everything takes longer than you think it does.”
Speaking of Mordor, Composer Chance Thomas announced that the expansion’s official soundtrack will be released on November 1st. We’ve heard it’s the same playlist that Gollum used when he was on his final road trip, so you know it’s something special.
Source: Official forums, Twitter