The Good Dinosaur was first announced by Disney and Pixar chief creative officer John Lasseter during the 2011 D23 fall expo for Disney fans in Anaheim, California. Initially set for a Christmas 2013 release; because of problems on this film, that release slot was filled by Disney’s Frozen. This resulted in no Pixar films rreleased this year.
During it’s long hiatus, the story was completely reworked, and Sohn played a close role in that redevelopment process. A brain trust of John Lasseter, Lee Unkrich, and Mark Andrews worked closely with Pete Sohn, restructuring and rewriting the film.
John Lithgow and Frances McDormand both revoiced their parts for the new version of the film.