Yeah, I expect backstage areas of this stuff to be like World Showcase where it's all behind the pavilion, especially given the vast amount of room WDSP has to work with. The green spaces may be temporarily used as backstage, but will definitely be on-stage one day.
Just like at this aerial from one of
@Marni1971's videos. They have a TON of land to play with.
And that's just land currently outside of the park boundaries. There's still a decent amount of dead space within the existing park as is that can be repurposed.