Salman Rushdie, interviewed by Craig Ferguson, go to about the 36 minute mark (if the video doesn't start there automatically) and he mentions being asked to write a graphic novel, then talks about Aquaman and Superman.
Note he gets his facts wrong on Kryptonite. Green Kryptonite weakens and can kill Superman. Red Kryptonite has random unpredictable results (like giving him the head of an ant). It's Gold Kryptonite which takes away his powers.