The twist?
Cool World would be for adults. The plot would follow a half-human, half-drawing — the child of a cartoonist and a cartoon named Debbie Dallas — on a journey to kill its father. (After all, if you were the product of an unnatural union, wouldn't you be a little upset? And possibly always in pain?) The selling point seemed to be as much the animation as the project itself.
In a recent interview with The Independent, Bakshi said that, though he didn't know how it would've been done, he wanted to make "the kid" itself half-animated. The studio bought the idea, and
Cool World was on its way to being born. Unfortunately, the path to realization would not be a straightforward one.