I've seen your post trending and decided to check out #steemitartchallenge and at that moment this post with Ned's portrait was just about $3, so I thought "well, my idea was bad,good that I didn't mention it yet",but than it started trending too )
Of course it is not for now, you could announce it like in one month and then provide sketches for some details from time to time to keep suspense)
I imagine it could have composition like an icon with lots of detail to trick viewers attention