My best guess (hopes) is the AP rate for June will come out around April 16th when the booking for the Winter/Early Spring AP rates ends. I would imagine June, July and August will be released. Then I would say that September will come out around June 2nd when the booking for the Spring AP rates end. It seems that is how they did the last round of AP rates.
I am waiting on June rates. Currently I have the recently expired GP rate booked. I really don't want to have to pay for 1 day base tickets but at least I have a discount. If the AP rates come out I will save about $550 (2 reservations for 2 people with QSP and 3 people with Dining) plus any difference in the % of the discount. If not at least that will be $550 I won't have to spend next trip