RR wrote that script back in the 90's, he was pretty new to the film scene and i think tried to make a sort of Predator meets Sparticus. Theres no way he deliberately was trying to write a shyte movie script and like nearly all movie scripts the first draft is nothing like the finished film - Just look at the first draft script for Return of the Jedi - i think he was trying to cram as much in as possible to the result it lost its believability. The 2 screenwriters came in and probably took one look at and decided to start from scratch, they wrote a script that echo's the original rather than RR's Pred/Sparticus story. From the teasers and the trailer i can see a few changes in dialogue and when these lines are spoken, so even the so called revised draft will be proven to be outdated.