Nah, actually many dark rides are pretty versatile, and all you need for most of them is a soundstage. Just like they've got a ton of.
First off, look at the likes of DCA for a smaller park that doesn't actually follow a clear hub and spoke design. Heck, look at any Disney Park after Euro Disney and it doesn't follow a true hub and spokes like MK. The Universal Parks are not a hub and spoke design either. I think to an extent Hub and Spoke is old fashioned. Why? 1) Future expansion is limited with few spaces of real estate (look at a map of HKDL and you'll understand) 2) The grand reveal of the hub and spoke at the beginning of the day kills the suspense, whereas a park that you just sort of walk through and discover new things in is favored now (DAK is the prime example, while it is sort of "hubish" especially the main gate is an example of just wandering and discovering something new...by design) 3) Imagineers love those backdrops (Seeing something from a distance and walking towards it is a powerful thing, and everything from Everest to Cars Land is utilizing this)
Frankly I love hubs, but they're seeming to be going the way of the buffalo for a plethora of reasons (and I use that word cautiously lest
@clsteve hear) Shanghai seems to be the first Magic Kingdom to be almost completely natural and less sharp. The hub itself is a land, and that helps with the natural reveals.
Issues with proper movement in and out can be addressed by new walkways on the backlot side where Pixar is allegedly coming in. The entire area west of TSMM is fair game. There are multiple points where paths can move through buildings or can be created. With themeing on the rear they can be brought up to standards, and since we're going to be in a richly themed environment that shouldn't be a problem. Though this is their job to figure out, and from what we know TS is the more likely of the two to get done first. Movement back there should be improved dramatically.
All that said, yes of course there will be sewage, power, and other infrastructure upgrades. I'd say that comes with the territory of billion dollar expansions. Somethings that are brand new are going to be destroyed (
@rteetz anyone remember the trams?) That comes with the in the budget.
Someone better versed in this than me can comment, but the major infrastructure cost on WiFi/broadband should've been incurred when they buried the cables all around the resort. That's expensive, but I'm pretty sure all of that can stay put. The WiFi routers and smaller more localized infrastructure at DHS can either be replaced for minimal costs or be completely reused for the new project. That comes with the turf of new business moves. Some value is lost from perfectly fine goods, but so long as a worthy value is created in the end it's alright. When they created the Mine Train we lost access to the SWSA (not directly due to construction, but that's how it ended up). SWSA was a perfectly good ride, but Disney was willing to sacrifice it for the good of the total project.
I think they've got the winning formula here. Spend money, and make it great.