AKV is supposed to open Sep 1st. AKV owners can book AKV starting May 16th, using AKV points. All
DVC owners can book there using any DVC points starting June 6th, subject to the 7-month window.
I believe you can use points at the Contemporary. If a DVC resort opens there, I expect you will no longer be able to use points at the hotel portion. That seems to be standard procedure with DVC: you cannot use points at BC, WL, BWI and once AKV opens, you will no longer be able to use them at AKL.