Wish for a dinosaur and watch all your dreams come true.
Captain New Eyes travels back in time and feeds dinosaurs his Brain Grain cereal, which makes them intelligent and non-violent. They agree to go to the "Middle Future" in order to grant the wishes of children in New York City. They are to meet Dr. Bleeb of the Museum of Natural History, but get sidetracked with their new children friends and run into the Captain's evil brother, Professor Screweyes.
Nobita accidentally finds a fossil dinosaur egg mixed with rocks in the dinosaur fossil exhibition site that he had visited before. He returns it to its original state with the 'time blanket'.
While defending his tribe from a bloodthirsty enemy tribe, a Native American warrior named Turok finds himself in a prehistoric dinosaur world along with his nephew, sister-in-law and the sadistic leader of the other tribe.