The Dark Knight concept art from legendary comics artist Bill Sienkiewicz shows Heath Ledger's Joker looking more crazed than ever. Sienkiewicz was the go-to guy for TDK , and it's no wonder. He pretty much captures exactly why the Joker is the scariest of all in Gotham. His concept drawings are pretty much a spot-on rendition of what the audience saw in the theatre. Click through for a few ...