Typhoid Mary
I recently saw the Elektra movie and was disgusted with well a) the movie and b) their portrail of typhoid mary.
IMO typhoid mary in the comics was a really cool and interesting deep character and deserves more. I think she actually had potential for an own movie (not ala elektra though).
Think about it: She's an really insane, cruel, fun, good-looking and calculating hitwoman with big knives, hypnotic and pyrokinetic powers and multiple personalities. 😄
What's not to love?