Either he has too much on his hands or this guys a genius (I prefer the latter), Jon Negroni explains how all Pixar movies are interconnected with each other. It even explains all the the easter eggs found on various Pixar movies and claims that Merida from Brave is actually Boo from Monsters Inc.
http://jonnegroni.com/2013/07/11/the-pixar-theory/
It's a pretty fun read, actually!
http://jonnegroni.com/2013/07/11/the-pixar-theory/
It's a pretty fun read, actually!