Don Glut wrote:
I'd heard rumors (all unfounded) as early as around 1964 (maybe earlier) about at least talk about someone thinking about doing a Batman TV series. But as far as I know, it was the success of AN EVENING WITH B&A, plus the then-current pop art/camp craze (in no small part thanks to Andy Warhol), that led directly to the BATMAN TV show with Adam West.

Pop artist Roy Lichtenstein, with his giant comic book panels complete with sound effects, was probably a more direct influence.