You don't want to know. Wait, yes you do.
Honestly, I think it would take $200+/day park admission, $2000 for an AP, and the cheapest resort room (All-Star level and similar) at $500/night to put a dent in attendance at this point.
Edit: I say "at this point", because guests now are basically frogs in a pot of water. Disney can turn the temp of the water up gradually (ie. relatively-small price increases year over year) and no one notices. You need something to shock them. Those kinds of prices would shock people.