Back in the 1950s, everything was a "menace", and flourished on "atomic" power...
...and, the Batman comics of the time reflected society's thoughts, but none moreso than an early 1960s issue of Detective Comics, wherein Batman faced the Atomic-Man!
The Menace Of The Atomic Man
With this knowledge, Batman and Robin went to protect Barker's business (now a shipping mogul). Sadly, that did not go well, with Batman having to make a daring escape from the now floating ship (that Atomic-Man had made lighter than air).
(filled with invasions and transformations, but, amazingly, Atomic-Man didn't make another regular comic appearance (unlike many of these obscure Batman villains, who at least made it to Batman's Lego Movie, though he did make it into Batman: The Brave and the Bold cartoon, in "A Bat Divided!").