The art is highly stylized, something you could do with Legends of the Dark Knight that you couldn’t do in the main continuity books that would have to follow more of a house style. Mignola’s art fits the mood of the book which combines a themes from Edgar Allen Poe as well as the Cthulu mythos of HP Lovecraft.

I love how Mignola really shows the life being sucked out of Batman, he grows more and more skeletal as the the battle wages, but returns back to form as he gains the upper hand.