I stumbled upon this on Facebook today, a black and white official short created to honor Batman's 75th anniversary. It seems like a piece of something larger. The gloominess and tone are darker and perfect Batman. A short clip that's well done.
And of course, when I watched this, I discovered they had done one for Superman last year that I missed. I really, really love this one. It's not a short but a celebration of changes - almost perfection. Played to the Superman movie theme.