The importance of a good script far outweighs star power and deep pockets. A couple of highly touted films that were supposed to be mega hits were lavished with cash and completely destroyed careers, hopes, and dreams because of bad scripts. The two films are Last Action Hero and Waterworld.
When both films were made there was an expectation that the big budgets would make up for the terrible scripts. In the case of Last Action Hero the 60 million dollar budget could not really help its star, Arnold Schwarzenegger, avoid the backlash that came with a terrible story. On the other side of the equation Waterworld made headlines as the most expensive movie of its time with a 175 million dollar budget. The film was a failure that made Kevin Costner go from being a bankable star into a questionable figure; again it was a terrible script that did it.
It’s all in the script people!