I would think that an overhaul like the one depicted on your map might be a shade difficult to pull off for real.
Anyway, we next move on to Adventureland. We'll start with a classic: Pirates of the Caribbean. But first, I have something to say...
Now, I really don't think it's physically possible to do anything outrageous with that one. We would have to bulldoze the entire ride building and rebuild it from scratch. You have to remember, adding in Pirates at the park was almost an afterthought. For various reasons, obvious ones, I might add, they initially considered not building and instead build the Western River Expedition, but they couldn't build it in time for the park's 1971 opening. And instead of being happy about the lack of Pirates, guests balked at it and when Burbank heard about it, the Imagineers decided to give the guests what they wanted. But the bigwigs wanted it to be smaller than normal, for various reasons, such as room in Adventureland. Florida's ride became notorious for being a "Cliff-Noted" version of the Disneyland original.
So I'm afraid we can't do too much with Pirates. It was always a condensed version of DL's (like I said, adding this in was almost an afterthought), so if you want to lengthen it, you'd be going for broke with the changes. You can't change too much without changing it all.
Now, obviously, while it would be nice to bulldoze the ride and rebuild it from scratch, I don't think it's really feasible, financially, logically or physically. So instead, I'll just work with what I've got. MEW, if you're reading this, please forgive me for any copying of your words on my part.
As with the ride in Disneyland, it will be a win-win for ride and movie fans. The ride changes begin even before you reach the entrance. The barker parrot will be returned, though maybe placed under the present black sail outside the entrance that bears the ride's name. Then the real changes start after you get into your bateau and cast off. The Davy Jones waterfall will be relocated to directly above the single waterfall.
Before you reach that, you will hear the "Dead Men Tell No Tales" line accompanied by Paul Frees' "No fear have ye of evil curses..." line, remastered and played by way of a special set of speakers that will be installed to make the voice float around to various points of the room. Meanwhile, before you go past the ghost ship in the storm, you will see a new treasure trove scene similar to other rides out there, but in this case, the skeleton would be created by way of an old Pepper's Ghost effect thought of for the ride way back when:
Davy Jones and his waterfall will become more HD (Is that what you would call it?) and that's about it. This waterfall will be relocated directly above the actual waterfall you go down.
This, of course, lands you in the "bombarding the fort" scene. Here, the dialog is almost left alone - "almost" in the sense that any mentions of Jack Sparrow will be removed from Barbossa's dialogue. If edited correctly, there won't be any worry about having to have Geoffrey Rush re-record more lines.
The well scene will lose its current dialogue and return to the old dialogue respectively. Jack will still remain hiding behind the dress-wearing mannequins. The new assumption is that rather than looking for Jack, the pirates are simply looking for the town's treasure. Jack, of course, who obviously isn't a part of the crew (Barbossa is presumably their captain after all) is secretly searching for the treasure himself, thus why he appears to have found it at the end of the ride.
The chase scene will have a very controversial change: The pirates chasing ladies for love... again. That means that the Pooped Pirate will be back in action here, once again holding the frilly pink underskirt and bragging about the woman to whom it belongs. The terrified girl pokes her head out of the barrel and looks around, quickly ducking back down at the sight of the barking dog which grabs the Pooped Pirate's attention. The pirates and the ladies will chase each other around in circles.
What's that? Where's Jack, you say? Well, he's moved to the far left side of the scene. Here, a pirate has fallen asleep in a drunken stupor, the key to the town's treasure vault tightly gripped in one hand, and the map leading to it in his lap. On either side stands a horse and a goat, both watching as a sneaky Jack attempts to steal the map and key. Right as Jack is about to get it, the animals make noise, causing him to retract as the pirate makes some horrid noises in the form of snores. Jack goes back and, of course, the animals react. This never-ending sequence is guaranteed to garner a few laughs.
The burning town scene will now have a new sight: a rowboat with two very intoxicated pirates seated in it and filled to overflowing with rum bottles, including some in the water nearby. The fire effect will be made more realistic than ever, as not to allow the shadows of the flapping curtains to appear.
Finally, a brand-new scene will be added. After you go through the treasure room, with Jack seated in it, the old way of disembarking the boat and going up an escalator to leave is now gone for good. Instead, you end the ride the same as in Disneyland: by going up a waterfall! But in this case, the ride's up-ramp will resemble the cargo ramp-type thing used in Paris' version. It's also home to a new version of an old scene: the arsenal, where various intoxicated pirates take potshots at each other, at the guests in the boats and at barrels full of explosives. And instead of just being them singing the classic song, it will involve them speaking like how the pirates in the Disneyland ride speak, when the ride was shown on television:
http://www.youtube.com/watch?v=7uYdPjyfs64 (wait until 7:35).
Once at the top of the waterfall, you disembark from the boat, down a new exit path that still leads into the same POTC-themed shop as before.
So concludes the improved POTC at WDW's Magic Kingdom!