You can do Disney with a coat on. Warm weather all year round is not a requirement
It will never happen, but if in the hypothetical world where you could relocate a themepark, you have to look at the amount of rain and if it's warm or cold rain. That in combination with wind has more impact than temperature or the occasional snow (which just adds a layer of extra charm
)
I've just returned from
Disneyland Paris and we actually discussed that one of the downsides of California and Florida is that you don't have the changing of the seasons like we have in Paris or in Tokyo.
If you could and want to relocate a themepark, I would look at places where the mentality is liberal and open-minded. Also, I would add near a large city, easy to reach by plane (good infrastructure), preferably centrally located. And a large piece of flat land, this was one of the requirements when they searched a location in Europe.
The only way I would see it happening if an earthquake destroys Disneyland beyond repair.
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