Airtrack360
All Star
that door thing tho...really really makes sense
The whole connection between the little girl in Monsters Inc and the Witch is lacking.
that door thing tho...really really makes sense

Good questiontheory makes a little bit of sense-- but it seems "closed" how they goin to continue to "connect" the next pixar movies?
Also
The main reason why most Pixar movies have talking "Things" is because:
1. They are movies made for kids (Turn on the TV and go to a kids show 90% of them will have a talking something that isn't human).
2. Talking things are a lot cheaper to animate than humans
3. Merchandise
If you WANT to believe this Pixar Theory then it WILL make sense.
But of course its going to be easy to connect things when you have a company that makes animated movies that all follow the same formula..
Remember Scar's(The Lion King) cameo in Hercules as a floor rug? I guess that means that has to be some kind of connection between the two movies. Given enough time and creativity someone can create a connection between the two, trust me.
There also a cameo in the recent Disney movie "Frozen". It has the characters from "Tangled" in it.
All this theory is doing is putting a story together using cameos...