The only reason Tokyo Disney is the way it is, is because it is run by a Japanese company where the culture there is to work hard, be efficient, take pride and be respectful etc if a western company took over the parks they would treated nothing more than cash cows and the they would suffer.
Look at Disneyland Paris, the EuroDisney company was a third party and look how they ruined the place. Disney bought it back and the place is now thriving. Not entirely their fault that TWDC and French government made them overbuild hotels and laden them with debt but still lol
Hong Kong Disneyland and Shanghai are only partially owned by Disney, the rest owned by their respective governments so they need the parks to do well or it will become a political issue.
So overall I would hope Disney keeps full control of the US parks and Paris at least.
And as a side note, Tokyo Disney is overhyped, DisneySea is stunning but Tokyo Disneyland park itself is a bit of mess with poor layout, ugly roofed Main Street, large areas of barren concrete, Tomorrowland buildings are too high, copied from Magic Kingdom to accommodate the Peoplemover but there is no Peoplemover, Rocket Jets were on just some random podium copying MK again with no Peoplemover station below it, old versions of rides still running eg using the original 1950s Dumbos rather than newer higher capacity 90s version, steam train ride only goes around Frontierland and not whole park, awkward bottleneck dead end at Splash Mountain, fireworks don't even go over the castle, they are off to the side.. I could go on. Oh and Alice in Wonderland is huge in Japan, they have the Mad Tea Party ride and an Alice themed restaurant but the Alice dark ride would have been hugely popular, a missed opportunity.