Lasseter, the CEO of Pixar, also directed Toy Story and Toy Story 2. It will open up a new chapter in the lives of Buzz and Woody, and the story was dreamt up by Lasseter, Andrew Stanton, Pete Docter and Lee Unkrich, the storytellers who have been the driving force behind all three previous films.
John Lasseter - "We love these characters so much; they are like family to us, We don’t want to do anything with them unless it lives up to or surpasses what’s gone before. Toy Story 3 ended Woody and Buzz’s story with Andy so perfectly that for a long time, we never even talked about doing another Toy Story movie. But when Andrew, Pete, Lee and I came up with this new idea, I just could not stop thinking about it. It was so exciting to me, I knew we had to make this movie—and I wanted to direct it myself."
There's no details yet on just what the fourth film would revolve around. The first three essentially told an epic, continuing story of the toys' life with their first owner, and ended with them finding a new one. "Toy Story of Terror" was a bit more episodic, by necessity giving them a smaller-scale problem that could be solved in half an hour of screen time.