Sunday is Monkey Covers day here at YACB. Because there's nothing better than a comic with a monkey on the cover!
Gorilla Grodd compels Flash and Vixen to fight on the cover of Flash #46 (1991) by Greg LaRocque and José Marzan, Jr.
(Standard disclaimer about telepathic gorillas not really being monkeys applies.)
Image courtesy of the GCD. Click on the image for a larger version.