With The Punisher as my all-time favorite comic book character and anti-hero, I obviously want to see another film. I enjoyed PWZ and liked Ray Stevenson's portrayal of the character, but Thomas Jane to me is still the best overall and I'd be thrilled to see him back (although I hold no objections to Stevenson returning, either. None at all). I think the best bet is to make a proper sequel to the 2004 movie (which I liked and despite the alterations to the character's origin, IMO the spirit and tone of the character was still there), get Ennis to write the new films from now on and I wouldn't mind Jonathan Hensleigh back to direct, but other directors I think can do a Punisher film justice would be Michael Mann, Christopher Nolan, Walter Hill and Sylvester Stallone (the new Rambo showed he can do a brutal and gritty action film that doesn't hold back anything). Keep the tone and style in-line with the Max series and especially the darkest ones like Up Is Down And Black Is White and The Slavers, and keep the atmosphere as urban, grimy and seedy as possible, with minimal to no humor at all.
I'd also love to see an animated series like the old Spawn cartoon, uncensored and explicit with it's content. Get Ennis to write, Bradstreet to provide the character illustrations and Jane to voice Frank. I think this would probably be the best bet for The Punisher to get some kind of success on another medium outside of the comics, but an animated movie like this (R-rated of course) would be another good bet.