This is what we have so far for our upcoming film, "The Ratcatcher."

http://www.youtube.com/watch?v=VQez5AS2IiI

The footage is final (but can be redone), but the audio is not. 

We used a few techniques that are worth taking a look at.

First, we chroma keyed the background in the middle scene. Then, in order to keep continuity, we color matched each shot. Then we added the speech bubbles and faces. Some facial animation was achieved digitally, some was done through head replacement. See if you can guess which ones.

Any comments/feedback would be highly appreciated.