I think it will be priced as much as a standard one day one park ticket, which currently is, if I'm not mistaken, $178 on the priciest days, $139 on low season, so 178 on opening week.
I don't think they'll charge more than that, lowering it later they would be shamed on social media.
And no meaningful discount for AP, their advantage will be to be able to buy them in advance, before anyone else (who might miss out because they're sold out).