WDW History nut
There may small gap indeed between the 1982 theatre and the bakery kitchen added in the past decade.Is there not a gap between the Les Halles Bakery kitchen and the IDF theater? An overhead view on Google Earth shows a narrow space that looks pretty empty apart from a theater service stairway and rooftop access bakery (which I assume could be relocated):
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Looking at YouTube vids, it looks like there's an existing emergency exit door from the Les Halles gift shop into this area, so in essence there's already access.
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So once Ratatouille opens, I guess the doorway could be widen, the corridor themed, and the space put into general guest use?
Perhaps the biggest drawback is trying to manage crowding. The eastern half of the France pavilion is already pretty narrow and gets jammed as it is. It may be best to keep Ratatouille crowds to the outside of the main pavilion on the new paths rather than giving them access into the existing areas.
Another overhead. You can see how narrow the existing path past the ice cream shop is.
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And crowding will be an issue. I dare say a separated exit lane will run along the entrance / queue route.