Regardless of what others may say, the original script is not much different than the one that was filmed.
The only MAJOR change was the Golden Gate Bridge section. Apparently it happens in the middle of the film, but Ratner opted to have it moved to the finale event.
Also the final battle was originally supposed to take place in Washington D.C., but Ratner and his infinite wisdom decided to take it to San Fransisco.
Seriously, how anyone can support Ratner, Penn, Kinberg, and Rothman is mind boggling to me. It just seems blasphemous that they literally defecated on the greatest story in comic book history.
This film was only made to make a quick buck.