There is potentially an extended cut.
Based on the fact that stuff from the trailers are missing or are greatly modified in the movie.
Scott has done it many times before.
The movie would definitly do with more character development and with a proper confrontation in the end (wich appear to have been shot).
The theatrical cut is already a Directors cut like Scott said, the Enxtended will be too.
One thing is for sure Scott is a great business man and he knows there is money to be made in doing so.
I hope he will go all the way and add something like 20/30.
Thats would really help the movie.