It's just about the name and maybe a bit about some of the know-how/processes. I wouldn't spend a dime to just get my hands on the 2006 code-base if I had the money, unless I was opening a software development museum. It's possible there will be a new development. "Flight Simulator" - having these two words for your product name will help with its marketing immensely. I sure hope they won't try extending the old platform, as it's a dead end street and I would rather want to see resources committed to a brand new (future-proof and scalable) engine instead. Let the old one go in peace.