[Kamen Rider 7]

i was surfing the web looking up information about Kamen Rider Black (im really digging the series) when i came across this image on a japanese message board:


it obviously resembles Shadow Moon, and i know he shows up in Black RX looking the same as he did in Black (albeit with 2 swords in place of the Satan Sabre). is this an unused concept for how he was intended to appear in that series? i only say that because his Moonstone is split in two like Black RX's Kingstone. Nothing i can think of makes sense seeing as how this exists and was obviously photographed for a promo of some sort.
what do you think fellas?