I don't know much about "a Genius" but i don't think Leone did any directing in this although i think Shobary mentions the intro as a Leone work.
There is still scope for an additional thread for Miscelaneos movies Leone was actively involved in which would be more specific than the existing "other Films connected to Leone " thread!
Yeah i saw some Fiat car advert or something in an hour long Leone docu!
On British sky sattelite tv they occasionally show an hour long Leone docu which shows a very grandois car advert he did in the 80's!
When i get the chance i'll send you a copy.An excerpt from the docu features on the OUATIA SE dvd.
i would imagine theres a simple reason why Colossus of Rhodes hasnt got a section; because its dogshite.