We saw The Incredibles when we were on the Wonder.
We arrived a bit early to make sure that there would be seating. At that time, approximately 25 minutes before the show, nothing was being sold and the kids were hungry. I went up to Pluto's and got 2 hotdogs and natchos and cheese for the kids. When I got back about 15 minutes before the show snacks were being sold but I'm not sure what the prices were.
My boys loved the natchos!