I am not sure if they have changed there mind or not. But fox did say they were committed to releasing all 9 seasons back around the time season 1 came out. This info was on the Dynasty Board. Not sure if that helps but perhaps there is new information there.
I personally think they might have dropped the ball with Dynasty Season 1. I know it would have cost more, but I think they should have released Seasons 1 & 2 together. I love my Dynasty Season 1 DVD and the packaging is great by SOOOOO many people told me they were going to pass on season 1 because there was no Alexis or Sammy Jo (was Sammy Jo season 2 or 3)? But I hope that this doesn't effect sales to much the people holding out for another season.....
Season 1 was great in my book. I enjoyed the writing and the show.