If they did FS3, I would hope that they would basically make it an extension of FS2 Open. i.e., upgrade FS2 Open with any features they needed, then include that version in their retail release (so they basically would be keeping the engine open source, and selling the FS3 assets and story with the FS2 Open engine, probably now called FS3 Open, but w/e). Then the community instantly benefits from any upgrades they make to the engine, and anyone joining us from the FS3 release steps right in to a thriving mod community that's been around for a decade+.