First of all, an editorial change by Batman's publisher and copyright owner, National Comics/Periodical Publications (now known as DC Comics) was initiated; with the object of revitalizing Batman's slumping performance and sales at the newsstands. Longtime Editor, Jack Schiff was relieved of his duties with the feature in the two publications it appeared in; namely the monthly anthology DETECTIVE COMICS and the eight times a year BATMAN Comics, which featured all of its stories as adventures of Batman & Robin.
One incredibly severe change came very early by having longtime confident and supporting character, Alfred the Butler killed! In that very same story, Dick Grayson's Aunt Harriet arrived on the scene to both take up residence and to put a female character in the hallowed house of stately Wayne Manor; thus defusing the accusation of a "homosexual dream" that was advanced in the 1950's by psychiatrist, Dr. Frederic Wertham in his anti-comic book diatribes in the book, Seduction of the Innocent (1954).
The second great external force on the Batman feature came from Hollywood. Having obtained the rights to do the now famous series, Producer William Dozier's Greenway Productions, 20th Century-Fox and ABC TV apparently found in their researching the comic strip that they needed some of the recently excised elements of the comic book stories. This included the Batcave, the Bat Signal and Alfred! Through the magic of the comic book story, Alfred's demise was found to have not really happened.
But Aunt Harriet remained in the cast, with those accusations of latent homosexuality continuing to haunt the feature.