Presumably there was then a late-night session with the creative team, who decided that it was time to really take a risk and start adding ape villains to their stories. Thus we wound up with the Flash's enemy Gorilla Grodd, a superintelligent gorilla that can also use telepathy (because of course he can), and the Ultra-Humanite, a mad scientist villain whose brain is placed in the body of a giant albino ape. But perhaps the most ludicrous DC Comics gorilla baddy was Titano, an ape sent into space and bombarded with cosmic radiation, which increased his size and bestowed upon him the superpowers of convenience, like his sudden ability to shoot Kryptonite beams out of his eyes:
"Knock it off, Jimmy!"
Nowadays, DC Comics has largely kicked their strange ape habit, but they do have the occasional callback to the company's gorilla-obsessed past. In 1999, the whole thing culminated in the furry insanity that was JLApe: Gorilla Warfare! a story where the entire Justice League was turned into gorillas.
Green Lantern is about to get bombarded with thrown turds.