i suppose you did not read the commentaries, because rich explains there that the shadow is the balck dragon, and that he didn't include the scene in the online comic becuase he felt that someone would have realized that - and would have shared it with all the forum. hence no more surprise when the dragon arrives to V.
I didn't know either until I asked the forum, and I read the commentaries religiously. I didn't check before replying, but I'm pretty sure he never called it a black dragon, just saying he didn't want to drop a hint that big.
Aww man! Even all the witty self referencing sigs are gone now! Squeeable Avatar by CheesePirate, Awesome banners by Pink Haired August