You are probably right, Bill.
The Tahiti and Rapa Nui Longhouses were taken out of operation late last year (November '13?), so DVD has been working on their conversion to
DVC vacation homes for several months. Many people say that the conversion of the Jambo House hotel rooms to Animal Kingdom Villas took about nine months. I would think DVD will have Tahiti and Rapu Nui converted to villas at least by the end of this year, if not sooner.
Since Disney is undertaking a number of major renovations at the Poly resort, including the main pool and Ceremonial House, perhaps it will wait until those projects are completed before it opens the DVC portion of the resort. Reports are that those non-DVC projects may not finish until mid-2015.
However, if the converted longhouses are completed by December 2014, I wonder if Disney would delay bringing them online until mid-2015? It could be losing 4-6 months of revenue, if not more, from some very prime real estate. I'm sure there will be pressure from within Disney to make this inventory as productive as possible and as soon as possible.