I realize that Disney World has long since moved away from introducing guests to unfamiliar concepts in lieu of providing bland, guaranteed-not-to-offend familiarity, so there's probably zero chance we'll ever see something like this...
... but I would still be delighted to see a Belgian-style frituur. Not just for their perfect fries with all the variety of toppings (mayonaise, curry sauce, gypsy sauce, stoofvlees, andalusian sauce etc.), but also for the various deep fried snacks and meats, like bitterballen, frikadel, viandel, Bicky Burgers and all the other mystery meats.
And maybe while we're at it, perhaps some poutine that actually resembles the real Canadian version, rather than fries topped with that goopy yellow cheese-like substance.