Take a look at these: http://melchorportfolio.wordpress.com/epic-mickey-2/#jp-carousel-59
Yet ANOTHER Disney employee has posted their EM2 concept art on the net. Here, we can see several areas that weren't in the game, such as that utterly terrifying melting Pinocchio face - what?!
Plus, this one is interesting: http://melchorportfolio.files.wordpress.com/2013/02/epicmickey2illustration4.jpg?w=700&h= note that this area isn't in the game. Also note the shadow of the Mad Doctor on the floor - it's easy to tell that this was pretty important.
http://melchorportfolio.files.wordpress.com/2013/02/epicmickey2environment2-e1359697029614.jpg?w=1000&h= this one is weird. Where was this in the game? Nowhere. If you look in the background, you can see Rainbow Falls, so clearly this was an extension of that area or somesuch.
It's the Attic, but note two things: the TV is still there, but it now has this demonic eye in it, hinting that it was originally going to have a lot more... violent... purpose than just broadcasting a silly TV show, like we got. Also look behind the vault door - in the game, that leads to the projector to the final boss. Here? No projector, and you can see machinery inside the vault, showing that the area would have extended further. So here's my theory of what they were going to do with the plot - the Mad Doc would have used the TV to open a portal to the real world, then send an army up there or something. Just a thought. Oh, and there's no TV camera 'ant' in the picture either, so that was clearly a rushed addition. I also wished they'd kept the lightning - a lot more epic.
And this: http://melchorportfolio.files.wordpress.com/2013/02/epicmickey2enviornment.jpg?w=1000&h= I still can't get over that *shudder*... what the heck is it?!
This too: http://melchorportfolio.files.wordpress.com/2013/02/epicmickey2environment7.jpg?w=700&h= it's some Mean Steet art. But note the title: 'Iterative Process'. An iterative process is when a place or object goes through a series of versions, or 'iterations'. We can apply this knowledge to the picture: note how in each panel Mean Street gets more and more destroyed. Clearly something epic was going to happen to Mean Street in the game.
That's a lot of theories. What do you guys think? Enjoy looking at the art! Just don't get nightmares....