I can only comment on what they did when SSR first went on sale.
They did allow add-on's with a 25 point minimum. But to get the incentives, the minimum was 100 points.
They began sales some time before they started taking reservations. When they did start taking reservations, it was less than 7 months out from opening date, so they gave SSR owners a head start in booking (can't recall exactly how much time that was - maybe a month or so?) before opening up ressies to the entire DVC population.
No prices/dates have been announced yet, though since the SSR promo ends Jan. 20th, many think that they will start rolling out the info. for AKV in early Feb.
There are many threads here about all of the relevant info. and speculation about AKV....happy reading!