I’m ashamed to admit that it was only after I finished watching the new Venture Brothers movie that I realized that Distributor Cap was a riff on the ‘66 version of Mr. Sparkplug.
Reading the wikipedia entries for minor Batman villains is like, “Mr. Sparkplug was introduced in 1969. He wore a rectangular costume that resembled a sparkplug, and had power to make electrical outlets stop working. After the Infinite Crisis event, he was reimagined as a serial killer with a fetish for electrostimulation. He had a cameo on Batman the Brave and the Bold where the Joker shoved him into a locker. In the New 52, the Riddler killed him and hung his costume over the mantlepiece as a trophy. He is now on the Suicide Squad.”