This is a great cartoon short. No surprise, since it's done by Bruce Timm, us fanboys' favorite producer of DC cartoons. It takes the viewer from 1938 all the way up to the last movie. I reckon I'll have to see it someday. I love that it is all animated, with some slight rotoscoping as well.
Meaning the actors look like the actors. It's interesting to hear how the music changes from time to time- hopeful to whatever that last bit was.