The Website says: "The Hidden Springs Pool, beach, marina and playground at The Villas at Disney’s Wilderness Lodge are currently closed for refurbishment and are planned to reopen in 2017"
There is no other released information. With the amount of construction to be done I don't think anything would be more than a guess. In theory they could have the pool area completed early in the process and move the construction fence behind it but who knows. If the quiet pool is important for a 2016 or 2017 trip I might plan to stay elsewhere.