Personally, I'd like to see a line of Park Scents candles...but it would depend on final cost if I'd be willing to purchase them.
Plus there would have to be some thought and true scent identification going into it. The bakery for example, with so many cookie scented candles out there, don't just take one, slap a Disney Parks label on it and charge through the nose. I'll go to Target and buy the exact same thing at half the price. Same goes for the pine or oranges...it would have to be the exact scent. (though those 2 should be fairly simple to re-create since they are in "air freshener" form as it is

It would be funny if they could actually come up with oddball scents like Jungle Cruise fumes, Splash Mountain chlorine, the Dinosaurs from UoE or even Turkey Legs.