I'm not sure that this series is literally set in the 1940s. But I might be wrong.I assume even though this series this going to be set in the 1940s, they are going to avoid some of the social realities of that era (like Jim Crow laws) and have to be an alternate reality where the society is not segregated, but still has a 40s noir look and 40s technology. Also, I assume this be in the later 1940s, so it's not set during WW2.
So would most of the characterizations be carried over from BTAS? Would Mr. Freeze still have a frozen wife, Mad Hatter is still a creepy stalker, etc?