Over at Rifftrax
they been tackling a 1940s Batman serial, they've done the first two "episodes" of the serial so far and likely will do the rest of the (I believe) 14 part serial if demand keeps up on the shorts.
Interesting look at very, very early days of Batman and even film adaptations of comic book characters. This version of Batman drives a simple convertible sedan as the "Batmobile" and Bruce Wayne lives in a rather modest suburban home.
Samples at the pages, purchase necessary for entire short. (The first one runs at around 25 minutes, the second one something around 15.)
Batman Takes Over
Batman: Tunnel of Terror