For the most part one assumes that the rules that Pixar does have, that a short must have a narrative story, and that it must be suitable for all audiences, probably aren’t much of a hurdle. While it might be interesting to see something more abstract from Pixar, story has always been the focus at the studio, and that’s not likely to change any time soon. Likewise, we expect animation from Pixar to be suitable for all, even if seeing something more mature from the studio isn’t without its appeal.
Source: Source: Cinema Blend
