The script has the potential to be a very good action movie imo. The original Predator script was not a great script but became a great movie due to good direction and performances by its actors.
Predators has better actors then the original, Nimrod Antal has a lot of potential as a director, and we all know that RR is capable of creating good action movies (Dusk til Dawn, Sin City and Desperado) therefore there is no reason why this film wont be a hit and is not as bad as some make out!
Yes it has flaws but even with these flaws its better then P2, AvP and AvPR! If these flaws have been corrected then we could have a great movie on our hands!
I honestly dont care is the Predator has black blood, large mandibles ect as long as its a good antagonist and does all the usualy things we expect from a Predator in a Pred movie (i.e. hunt and kill) then I am happy!