C'mon, man, we'd all like to see Preacher on the screen, but let's look at it realistically. Preacher would basically be the most controversial film/television series of all time. It contains material that is highly offensive to just about any group of people, not to mention being filled to the brim with horrifying graphic violence and ridiculously taboo sex acts. The controversy and protests that sank the box office dreams of The Last Temptation of Christ, Dogma, The Golden Compass, etc would be nothing compared to the outcry that would assault Preacher once word of its subject matter got out. The audience for this series may be big in the comics community but in the film and television community it's pretty small. A studio would have to be out of their mind to think this project would be bankable.
It was a fun possibility while it lasted but did we really think we'd be seeing Arseface onscreen? Or the Last Scion throwing around his own shit? Or the Devil whipping the flesh from the Saint's back? Did we really think meat woman would actually be filmed, ever? It was never gonna happen.