Pizza would be doable too. KINGS ISLAND, while not WDW obviously serves LaRosa's pizza, local CINCINNATI pizza and it is DELICIOUS and something we always looked forward to. I don't think WDW has a GREAT PIZZA PLACE and having it a character thing wouldn't be a big deal either. Offer an extensive salad bar and with appetizers, it would work just as any other character meal.
While I liked the CARS movie, playing it over and over for each meal wouldn't make for a unique experience each time and with the Sci-Fi already a theme with cars, wouldn't be that exciting and I can't imagine teenagers sitting and watching that movie and being enthralled

sitting in Lightning McQueen.