In the 1950s, many superhero characters lost their popularity. There were many other comic books being published, and these publications had to compete against the new arrival called television. The superhero genre almost ended. But comic-book-publishing companies revamped some earlier characters such as Green Lantern, and the superheroes have been successful ever since.
Something similar happened to Batman. By 1964, sales of the Batman comic books had fallen significantly and DC Comics was considering killing him off for good. But once again a superhero was saved. When the Batman TV series aired in 1966, this superhero was soaring to new heights. In 1966 the Batman movie brought further interest, as did the animated series. It took longer for Wonder Woman to become a TV feature. After a few aborted tries, in 1975 "Wonder Woman" debuted on ABC and then was moved for a short time to CBS