"The Incredibles" happens next in the Pixar Theory timeline, maybe in the 1960s. In the movie, the government uses human "energy" to create artificial intelligence. That energy, Pixar Theory says, is the magic left over from "Brave."
This is the next one in the Pixar Theory timeline. Again, we have an animal who comes in contact with humans and is, or becomes, really smart through their friendship. Pixar Theory once again credits "Brave"-era magic for that.
"Toy Story 3" is full of hints that all Pixar movies are connected. Andy receives a postcard from "Up" characters Carl and Ellie, Boo from "Monsters Inc." appears as an older child in daycare (confirmed by Pixar)and Darla from "Finding Nemo" is on the cover of a magazine.
At the end of "Monsters Inc.," the monsters learn that joy is a more powerful emotion than fear, which theoretically ends the Pixar timeline in a moment of happiness and harmony between humans, animals and technology.
Yes, human love is original magic from "Brave" that keeps this whole timeline together.
However, according to Pixar Theory, this is when the timeline collapses in on itself. When Sully goes back into time to collect human energy and accidentally reveals himself to a little girl named Boo, he changes everything.
What's the next story? The first story, according to Pixar Theory.
It's theorized that as Boo grows up, she cannot forget the "kitty" who appeared to her through a portal door. She grows into a powerful witch. Trying to track down Sully, she goes in and out of history through those magical portal doors.
Why do fans think this? The witch from "Brave" can use magic portals, and she has items from throughout history in her house. Cross-movie Easter eggs can also be interpreted as Boo leaving clues throughout history as she travels through time. And if you look closely you can even see a drawing of Sully, etched into her things.