What few people know is that before Michael Bay got the job to do the Transformers movie, the Henson Company actually did a pitch for a new series for kids. What you're seeing there is a concept puppet that was sadly never used as the pilot never aired.

We're filthy liars. It's just a kickass felt puppet of Optimus that someone put together. I'd like to see a whole series of them, frankly.

Found via MAKE Blog.