its was one of the trailers that got shown with Planet Terror and Death Proof when they were shown back to back in the US.
It wasnt going to be released but i think it is now being made due to popular demand.
There were a selection of trailers released along with the aforementioned films directed by guest directors which also included Rob Zombie of House Of a Thousand Corpses fame and SPaced's Simon Pegg...
Should be good!