We came across a photo of two imagineers working on a model for Orlando’s Little Mermaid attraction, Under the Sea: Journey of the Little Mermaid. Well, after looking at this photo for a while, you might see a familiar face in the background.
Look closely and you will see Mack from Cars sitting behind the model. Now, we can assume that this figure will used in the upcoming E-Ticket attraction opening next year at Disney California Adventure, Radiator Springs Racers.
You've been on Test track right? There is a giant truck in that ride in which your car almost runs into. It flashes it's light, honks the horn….etc. I believe this is the cars version of that scene.