hmmm

interesting to see two people COMPLETELY positive that there will never be one and one person who sounds confident that there will be.
Please reread what Dean and I wrote. Both of us left the door open to the possibility, yet you wrote that we are "COMPLETELY positive that there will never be one."
A
DVC resort needs land.
BWI and BWV were designed and built at the same time on undeveloped property. BCV required moving an asphalt valet parking lot and building above a water channel, but those weren't significant. WL had plenty of room for the adjacent VWL. AKL sits in the midst of a huge tract of undeveloped property, so there was plenty of land for AKV.
The north wing (and the south wing for that matter) are a poor use of valuable land at the CR; I wouldn't be surprised if the CR is eventually flanked by two DVC towers.
The charm of the POLY would be hurt by high-rise construction there, so a DVC resort would need to maintain the style of the current POLY longhouses -- and that takes a lot of land for a reasonable number of rooms.
The existing POLY parking lot would be a possible site for DVC wings, with parking moved further away (using a corner of the MK parking lot; but that would mean that the parking would be awfully far away from guests with waterfront POLY rooms.
I already mentioned the possibility of the Luau area, but the long-running Luau dinner-show helps give the POLY its identity.
I'm not trying to be negative, just realistic about the need for land and the need to keep the charm and convenience of the current POLY deluxe resort intact.
In favor of a DVC component at the POLY, Disney Vacation Development management is undoubtedly aware that a DVC resort at the POLY would have huge demand.