The odd things I speculate about as a fan--. Suppose the “Cars” world is one in which the “robot apocalypse” happened, and the robots won? Or, for you “Transformers” fans, the Decepticons took over--? Once having wiped out the humans, the robot society collectively decided that automobiles were the coolest and most aesthetic machines (and roads very convenient for getting around) so settled on the “car” form as a basic design. Then, the “Robot Masters” caused monuments, etc., to be modified into the car-centric shapes we now see, reinforcing the idea that things have always been that way (ala the old “Planet of the Apes” franchise). So, the next movie in this series would be “Escape from the Planet of the Cars”? Interesting thought but rather creepy to consider that Lightning and Mader might be Terminators underneath--.
BTW, we saw a trailer for “Rise of the Planet of the Apes” along with “Green Lantern,” and the premise seems risible. The idea of the original series, that the humans bombed themselves back to the stone age and the apes evolved to take over was halfway acceptable for suspension of disbelief. The new movie—naah--.