I voted for Crispus Allen, cause I have an affinity with Gotham Central characters, like Allen and Montoya. Apparently there's a character in TDK sort of like Montoya, but not in name...
The others, I dunno. I've never been much of a fan of Leslie Thompkins because she always felt like a tacked-on mother surrogate, professionally taking away from Alfred's character (surgeon, emotional crutch). Possibly I also dislike her because the actress voicing her in TAS did such a terrible, dispassionate job... If they ever
do decide to use her, I'd suggest Vanessa Redgrave or Helen Mirren for the role.
As far as the Arkhams go, I never thought it made sense that a mental institution should be run hereditarily. Plus, they alread figured Jonathan Crane as administrator to the Asylum, so I don't think we'd have to go into its management again...
Harvey Bullock is a very different character than Flass (who is utterly corrupt while Bullock is goodhearted yet legally ambiguous and adverse to Batman), but he's sort of a stock character by now (fat slob policeman) who doesn't seem all that original anymore (after Bullock in TAS, Eckhardt in B89 and Flass in BB)...
Sarah Essen
definitely shouldn't be introduced. I never liked her and since we haven't even met Barbara Gordon (Jim's first wife) in Nolan's continuity, it'd be a weird move to feature Essen all of a sudden. In the comics, I never felt her to be a real character, just someone put in to create conflict (her distrust of Batman creating a rift between her and Jim, their affair ending Gordon's first marriage) and ultimately, her death in the comics was the final tug at the heartstrings of an essentially perfunctory character.
Aunt Harriet... well...
