I doubt there will be another one, but anyway -
"When the very first details about The Dark Knight were released, they alleged that Roman Sionis/Black Mask was to be one of the antagonists of the film.[citation ][/citation] He was described as an industrial heir who loses his company to Bruce Wayne and adopts the Black Mask persona for revenge. By the time Jonathan Nolan wrote the final draft, he was cut."
Black Mask would fit pretty well, he is much like Wayne in which he is a heir to a company and at one point he fucks up and he searches for himself but in the end, he goes to the otherside, he creates the False Face Society in which he and a few others done masks to conceal identity and commit large scale crimes and drug trafficking.
Any else notice
Zsasz in Begins? He's still loose.