I Believe PMDG were going to hit the X-Plane market with their previously done JS41 for FSX.I think that changed however when J.Rollon started showing previews of his fantastic JS 31/32.They had to rethink their strategy, I think it would make sense to enter a product into a new platform with systems that are easier to simulate than a 737NG.This is why I believe PMDG will enter The X-Plane playing field with a highly functional DC-6.