When DAZ began, they supplied a good deal of content for Poser. DAZStudio was in its infancy and at one time was for purchase. As their software developed and eventually became free, they integrated Poser and DS content into one package, the best of both worlds. At one point along the way, DAZ 3d changed hands, and the corporation decided to move away from Poser by making Genesis and company more exclusive to DS rather than Poser. Currently, DAZ vendors still create some Poser content alongside their DAZ content but that is becoming far and few between. The generation 4 models (Victoria 4, Michael 4, etc.) are still very popular and widely used, that accounts for content still being produced and available, but who knows how long that will last. A marriage between the two? I don't think there is any possibility of that happening again; that ship has sailed.