The idea of selling the physical structures doesn't make any sense. Disney Vacation Development (the entity that actually builds and markets the resorts) doesn't actually own the land. Long term leases are in place which are certainly not favorable to any one Disney business unit over another.
And the combined operations of many DVC/cash resorts would complicate matters--particularly a resort like AKV where some floors are cash and some timeshare in the same physical building.
Disney could certainly farm-out management of the timeshare operation. "Disney Vacation Club" would cease to exist and our ownership would roll into another timeshare program. I wouldn't rule that out entirely at some point in the next several decades, but right now the timing doesn't seem even remotely appropriate. DVC is one of the few timeshares actually doing well in our economy. And with the aggressive expansion plans (Hawaii in particular), it doesn't make sense that Disney would want to suddenly have its timeshare holdings fall under another shingle.
Farming-out management services would make the most sense when/if Disney decides to get out of the business of actively building and selling new resorts. In addition to the management fees the buyer would receive, they would benefit from adding the existing stable of DVC resorts to their portfolio.
But if Disney is going to continue to build and sell (and including Hawaii they easily have 6-8 years worth of inventory in the pipeline), it doesn't really make sense to bring another entity into the mix. DVC has been a real cash cow for Disney--they want to continue to grow the program beyond theme parks rather than getting out of the business.