Nelvana did the Boba Fett cartoon for the Holiday Special, so they had already had done a pilot of sorts. IIRC, even Nelvana was shipping the drawings out to Japan to be inked, painted and filmed in the 80's.
Any studio that could make Rock and Rule is pretty cool in my book.
Maybe someone could ask Mr. Zicree if he can find that VHS tape, and post some screenshots?