One subject that I dont think has come up is how Two-Face's voice should sound? Should the actor use his natural voice, the same he uses for Harvey, or should he fake a hoarse-sounding voice, kinda like TAs? In the comics, Two-Face's words are in a different font, suggesting a different voice. But i'm kind of afraid it might come off as sounding too forced if it's done in live action like it was in TAS. Personally, i hope for a very subtle difference in the voice, so you almost don't notice the change. This way, we could have moments where the Harvey persona slips out for a second (like in Dark Victory when Batman visits Harvey in Arkham), and Batman doesn't really seem to notice.