and here is some info on Bill Finger the "co creator' of Batman

Bill Finger (February 8, 1914–January 18, 1974) was an American writer who is best remembered (though not officially credited) as the co-creator of the character Batman with Bob Kane as well as the co-architect of the series' development. He helped create the Joker[1], Catwoman[2], Two-Face[3], The Riddler, and other classic Batman villains, and he worked on The Green Lantern.

Batman
Finger joined Kane's makeshift studio in 1938. A year later, the success of Superman in Action Comics prompted editors at the comic book division of National Publications (later DC Comics) to request more superheroes for their titles. While Bob Kane is credited as the creator of Batman, controversy was stirred by the book Men of Tomorrow, which claimed that Kane had created a "Birdman" while Finger suggested the name "Bat-Man". However, Finger himself admitted on more than one occasion that Kane did indeed create a version of the character before Finger got involved with the project. Kane was inspired by the flying machine of Leonardo Da Vinci, a movie he had seen called The Bat and of course, Bela Lugosi's 1931 film Dracula which featured a "man-bat" in its opening credits.
In an interview for Jim Steranko's History of the Comics: Vol. One Finger described in detail, the extent of his suggestions about the costume. He felt the original character (The Bat-Man) looked too much like Superman with a mask and bat-wings. He recommended replacing the Da Vinci-inspired wings for a cape, giving him gloves, and changing the character's bodysuit from red to grey. Perhaps most importantly, Finger found a book with a picture of a bat in it and encouraged Kane to replace the character's domino mask with a more bat-like hooded cowl, complete with "ears" which would make the character distinguishable even in silhouette. It's generally agreed that Finger encouraged Kane to leave out the character's eyes when he wore the mask. Although Kane would accept many of these suggestions, one cannot escape the direct influence of Lee Falk's character The Phantom, as Kane admitted that he studied newspaper strips on a routine basis. Of Finger's contributions, Kane wrote:


Bill Finger was a contributing force on Batman right from the beginning. He wroter most of the great stories and was influential in setting the style and genre other writers would emulate . . . I made Batman a superhero-vigilante when I first created him. Bill turned him into a scientific detective.

Finger wrote the first Batman script, while Kane provided art. Because Kane had already submitted the proposal for a Batman character to his editors at DC Comics, Kane was the only person given official credit at the time for the creation of Batman. This was not unusual in the comic books of that time, where the artist would often sign his name to the first page of the story and the script would be uncredited, but it was in contrast to other features on which Finger worked where he was identified as scripter, such as Wildcat and Green Lantern, and in contrast to the credits on features by the same publisher such as Superman, where writer Jerry Siegel and artist Joe Shuster both received credit during the time they were affiliated with the publisher, even on stories ghosted for them by other writers and artists.

Kane acknowledged that Finger named Batman's and Robin's alter egos. "The alliteration of the names — Bruce Wayne, Bob Kane — was probably one reason Bill came up with the name."[5] When Kane wanted Robin's origin to parallel Batman's, Finger made them circus performers murdered while performing their trapeze act. [6]

According to Wizard Magazine, Bob Kane had Finger enter a work for hire contract. It is this contract that provided National and DC their strongest defense against later claims by Finger.

Batman was a success, and soon after, National suggested that character receive a youthful sidekick who the readers could use as an audience surrogate. Kane initially suggested an impish character like Puck, while Finger suggested a more down-to-earth character. The name Robin was suggested by Jerry Robinson who had arrived at the studio while Kane and Finger were kicking names around. Finger went on to write many of the early Batman stories, including making major contributions to the character of The Joker, as well as other major Batman villains.

Finger was a very meticulous writer and as such, a slow one, leading editor Whitney Ellsworth to "suggest" that Kane replace him with someone else. During Finger's absence, Gardner Fox contributed scripts that introduced Batman's early "Bat-" arsenal (the utility belt, the Bat-Gyro/plane and the Batarang). Upon his return, Finger created or co-created items such as the Batmobile and Batcave, and is credited with providing a name for Gotham City. Among the things that made his stories particularly distinctive was a use of giant-sized props: enlarged pennies, sewing machines, or typewriters.

Kane and Finger brought together such diverse influences as pulp magazines, comic strips, film noir, and the slapstick comedy of teams like the Marx Brothers and the Three Stooges, creating a "Cartoon-Noir" that was widely imitated. Eventually, Finger left Kane's studio to work directly for DC Comics where he still supplied scripts for Batman as well as many other characters.

The Green Lantern
In 1940, Finger collaborated with artist Martin Nodell on a new superhero feature in All-American Comics #16 called The Green Lantern. Both writer and artist received a by-line on the strip, with Nodell in the earliest issues using the pseudonym "Matt Dellon". Nodell's name appeared first, before Finger's, on the stories that he drew, although when ghost artists such as Irwin Hasen were used, Bill Finger's name appeared first so that the credits instead read "by Bill Finger and Martin Nodell". While the Green Lantern was retired for a time, eventually returning as a completely different character with the same name, and was never as popular as Batman, the character remains an integral part of the history of DC Comics and has reappeared alongside the more contemporary version of the character recognised as his predecesstor. Today, Finger receives no credit for having co-created Green Lantern, the official position being that Nodell created the character and Finger simply supplied the early scripts.


Film work
As a screenwriter, he wrote or co-wrote the films Death Comes to Planet Aytin, The Green Slime, and Track of the Moon Beast. He also wrote a Clock King episode of the live-action Batman TV series.


Credit

Business-savvy Bob Kane negotiated a contract with National, signing away any ownership that he might have in the character in exchange for, among other compensations, a mandatory byline on all Batman comics. Although Finger did receive credit for other work done for the same publisher in the 1940s. For example, the first Wildcat story has the by-line "by Irwin Hasen and Bill Finger"—Sensation Comics no. 1, July 1942—and the first Green Lantern story said that it was "by Mart Dellon and Bill Finger"—All-American Comics no. 16, July, 1942. Finger began to receive limited acknowledgement for his work on Batman in the pages of the comic book only in the 1960s, as a script-writer (for example, "Letters to the Batcave", Batman no. 169, Feb. 1965, where editor Julius Schwartz names him as the creator of The Riddler, one of Batman's recurring villains). Finger's working arrangement, by comparison to Kane's, left him only with the fees he earned for the scripts that he continued to write, and no credit on the Batman stories that he wrote without Kane. Finger, like Joe Shuster, Jerry Siegel, and many other creators during and after the Golden Age of Comic Books, would resent National for not paying him residuals on stories he wrote that were being reprinted in the 1960s and early 70s. This policy was changed in 1975, ironically, the year after Finger's passing in February 1974.

It was the standard policy at National(DC) that with only rare exceptions, writers wouldn't receive a byline, thus, Finger went on to write a number of uncredited stories for DC. His 1950s work on Batman with artists Dick Sprang, Jim Mooney, and others was known for putting the Caped Crusader and the Boy Wonder through elaborate death traps. These would lead some to suggest that without Kane, the series grew increasingly silly as it moved away from its "gothic" roots; others would contend it was actually the editors who changed the tone to soften Batman's image, due to the increasing criticism of comics during the early 1950s. Finger later wrote for television and radio but writing comics was his main profession.

Posthumously, Finger has been named to the Will Eisner Award Hall of Fame and Jack Kirby Hall of Fame. He is also the namesake of the Bill Finger Award, founded by Jerry Robinson, an early collaborator with Kane and Finger, who shares credit with them for creating Robin according to many sources.[citations needed] The award honors lifetime achievements by comic book writers. In 2005, the award honored Arnold Drake (creator of the Doom Patrol and fellow uncredited Batman writer), as well as Jerry Siegel who was given a posthumous award.