Kevin Spacey was the only actor who was being paid Union scale during the project in which Spacey himself put back into the film to see its completion.
For the final battle scene, Al Pacino literally had no money to shoot the scene and didn't know where to shoot it. Director Michael Mann, who was directing him in Heat at time, volunteered some of his crew to shoot the final battle scene which was shot all in one day.
Before finally settling on a studio, Al Pacino's final choices were Miramax Films and Fox Searchlight. Harvey Weinstein who had seen the film in its rawest footage, loved the film and really wanted it badly. Pacino chose Fox because Tom Rothman who was the then head of Fox Searchlight loved the film as well and oversaw the project until he was promoted to the head of the studio. It was a decision that Pacino regretted as he was left alone without any basic help as the studio's new regime was forming into place.
In discussion, Pacino and co. are studying the "*G* of Edward's heirs the murderer shall be," and decide, since it's supposed to refer to Clarence, that they'll change it to "'C" of Edward's heir's." The problem is, the prophecy very deliberately refers to Richard, Duke of GLOUCESTER and Clarence, Duke of GEORGE. With "G" the prophecy is true. If you change it to "C" the prophecy becomes false, and can no longer refer to two people.