The date has been given for the release to DVD of the complete season 1 on DVD. I follow Dallas TNT on twitter & this was their tweet from the other day.
It's official! The Complete First Season of the all-new #DallasTNT will be available on Jan 8, 2013!
This is a few weeks before the start of Season 2, which is rumored to start on Wednesday Jan. 23, 2013.