This could be fascinating, but only in a art house kinda idea where the style changes from live-action to animation and you never know when it will occur. I saw something somewhat similar in the film The Miracle Maker. It was a mixture of stop-motion (Claymation) and traditional animation. It was interesting, and still somehow worked.

So, this could never be a traditional style Star Wars edit, but it could be an artsy alternative.

Was thinking about your statement about the Chancellor kidnapping, and how we have yet to see it on The Clone Wars... Well you see it happen in the Clone Wars cartoon. You also see how General Grievous gets his cough (Mace chokes him) You also get his origin. So you could use that older cartoon to fill those gaps.