On this third page from the sketchbook, I drew this rendering of how Splinter might appear in his "morphed" form. Here's a transcription of what I wrote on this page:
"Splinter could have the (limited) ability to morph into a huge were-rat
Perhaps he can't do this too much or too often, because it takes a lot out of him.
Whipping action tail!"
I wonder how this would have worked out if we'd actually gone forward with it?
I find it a little amusing that I provided Spinter with some modesty-preserving torn shorts in this drawing, much like the Incredible Hulk and his purple pants. -- PL