You can dream, but what are the odds of any of them doing it?
Out of them, Cronenberg is the most interesting choice, I'd really like to see him tackle it, but I think he'd take it too left field... Though anyone else notice how Ed Harris' character in History Of Violence looks very much like everyone's favorite German antagonist in Preacher?
Rodriguez also has the gruesome streak in him to suit Assface well
Proyas interests me though, not only because I'm biased in favour of him, but because his style is a little different to the body-horror type stuff of Rod and Cron. DePalma I'm not altogether that interested in, and Danny Boyle would be a good option as well, solid, but I'm not sure how he'd be able to handle the characters [he always seemed shlock to me, even though I loved Sunshine's development]
Needs a mellow touch, but either way, this series/movie has been on the cards for a while, and I'm happy to wait until something good comes out of it since I'm a huge Preacher fan.