7) Johnny Depp
In retrospect, given how close a working relationship Tim Burton and his recurring star Johnny Depp have, it is strange that they did not work together on Burton’s two Batman films, where Michael Keaton instead played the role. If you believe the uncorroborated rumours, however, it seems Burton did try to get Depp the part.
While Burton and Depp were not familiar with each other in time for 1989’s Batman, by the time that the threequel Batman Forever came around they had worked together on both Edward Scissorhands and Ed Wood. Michael Keaton wanted to retire from the role so Warner Bros. were looking to recast. Burton, who was also bowing out of the series, apparently suggested they pick Depp to replace him.
Fast forward a few years and many fans campaigned for Depp to play The Riddler in the Dark Knight trilogy. Neither the actor nor the character eventually appeared, however.