In 2002, WDW magic kingdom passed Tokyo Magic Kingdom to be the #1 attended theme park in the world. TDS drew some visiters from TDL. Guests at the Tokyo resorts do spend more per capita than US guests, usually attributed to the tradition of buying small gifts (and the office ladies with disposable income).
I have been thinking about HP in wdw a bit. I agree with the poster that Hogwarts should be a resort, but I see only a small resort with a few hundered rooms. This is what I would do if I had the rights to it and wdw.
I would build a tunnel from MGM studios under the drive to the parking lot to that strip of land up there. I'd make HP land a land of MGM studios, not a new park. On the MGM side, guests could go up ramps to the train station and catch the hogwarts express, which crosses over the drive, simulating leaving out of London, and goes a circle route to Hogwarts. Or, guests can go under the station and into the tunnel, which transitions guests into the HP land. There could be a lot of theming and stuff in there for the transion. You come out of the tunnel and into Diagon Alley. This would be a full sized reproduction. On one side of the street is a merchandise store like Emporium - it looks like a lot of little different stores but it is all one big long connected one. The other side is really false fronts and facades, maybe some little things, but mostly hiding what is behind it, which will be the Gringott's ride. You'd take a turn and be in front of the bank. The cue would wind through the lobby of the bank - there could be animatronic goblins up there at the counters with "next window please" signs and stuff like that. You'd cue through the lobby all the way to the end. The ride would be an indooor mine train wild mouse, with walls like the dungeon and vaults between each turn and other props; you'd get to a big open vault and lots of treasure and animatronics at the end with some bounces and dips.
There would be a separate section for Hogsmeade; I'd have the bar here (think Rose and Crown, only a bit scruffier) and the ice cream place you take dates!! The main attraction would be a haunted mansion like dark ride through the shreaking shack.
But the main attraction is of course Hogwarts. There'd have to be the lake, and you could go over by boat or by horseless carriage (just make them always horseless and don't worry that they are really there). At the end of the lawn would be Hagrid's Shack which marks the entrance (fast pass distribution?) of the dark forest ride. This would be a test track like ride with the cars themed like the banged up flying car. The first scenes would be gentle - a unicorn drinking from a shining pool, etc - then get a little more suspensful - maybe the hint of giant...are those centaurs going to chase you? - then get frantic as you race away from the spiders! Until you come to an animatronic of a giant spider and a whole crazy mess of them, and the car speeds out and bursts out of the forest like the journey to the center of the earth car bursts out of the volcano, with a quick spin around the whomping willow maybe.
On the other side of Hogwarts would be the Quidditch field. Think about a soarin like ride. You get on the seat and it has a broom stick sticking out the front! And you are raised in front of an Imax screen and move in motion with the film...except this time you have on 3-d glasses and things like the quaffle and the bludgers fly out at you in 3-d! There could be some story along with it.
For Hogwarts, I'd make the upper floors the small boutique hotel, and I was thinking of the sorting hat, too. Basically you could make the whole resort what is considered "concierge" at other wdw resorts, and they could send you a questionnaire before hand and try their best to match you up, but you'd have to get sorted when you checked in. There would be a direct entrance to the lower floors of Hogwarts, and the park, from the upper floors for guests of the resort.
Downstairs I'd have the banquet hall - this could be like a character meal buffet, with some special effects like the ghosts and moving pictures.
Also downstairs, I'd have a dark ride, like a Hogwart's tour. I'd use the trackless vehicles like aquatopia or TDL pooh. You'd go through things like the classrooms - the defense against the dark arts room might have a bunch of pixies loose! Then you might go through the green house. You might go up to the upper floors and find the door to the sorcerer's stone, the vehicles could go all over the chess board, moving and spinning! And then back out, maybe into moaning myrtle's bathroom - there could be squirting water that just misses you always. And down into the chamber of secrets, riding through those scenes and the hint of an animatronic basilisk before you narrowly escape!! Those sorts of things - think about the pooh like vehicles just magically zipping through those sets spinning around and so on.
Of course, outside, you could also have a big hedge maze for the tri-wizard cup!
I don't think I'd even try for places like the ministry of magic or the Weasley's or Dursley's houses; I think if you had Hogsmeade and Hogwarts you'd have most of the big interest. You could even have a 20K leagues sort of ride "down into the lake" to check out the mer-folk. You could do a lot. You could even, for the little ones, have the "Hogsmeade Fair" going on, with some carnival like rides and stuff.
