Disney announced two new Pixar films at its D23 Expo Saturday, one from each of the co-directors of "Up." One film will explore the human mind, and the other will imagine a world where dinosaurs still walk the Earth. Pixar stalwarts Pete Docter and Jonas Rivera, brought on stage by Disney Chairman Rich Ross, joshed with the audience a bit. Related Articles:? Lasseter on Pixar, 'Up' and the Failure of 'Frog' read more