AP Discounts for the fall and other discounts for packages and rooms have historically come out toward the end of June, I think Disney wanted to not have to discount their rooms with the opening of Galaxy's Edge. Indications from WDW Info and other sources have indicated that the expected room occupancy for the fall is not as great as Disney was hoping for. A lot of discounts are booked through today as the last day of booking, so I would guess that the next round of discounts would be coming very soon.