The 3-D film had been planned to hit theatres in May before Disney's announcement Wednesday. It means that 2014 will be the first year since 2005 to go without a new Pixar movie.
"The Good Dinosaur" imagines a world if dinosaurs never became extinct. The production has been rocky, with director Bob Peterson exiting the film last month. A replacement hasn't been named.
Pixar's "Finding Nemo" sequel, "Finding Dory," has been pushed from November 2015 to June 2016. Planned for summer 2015 is "Inside Out," a film set inside a young girl's brain.