X-Men (this is the easiest comic franchise to make sequels to outside Spidey and Batman. There are more stories to tell and a large enough fanbase around alot of characters to keep making these films. Zach can do this.(
Sin City (not to save, but to bring it back bc their should be two more and it is taking entirely too long to get RR, Tarantino and Frank Miller back together)
Constantine sequel
Punisher sequel
The Justice League movie (that movie is screwed before it even comes out and I think he could make an interesting take on it.)
Outside of comic books, I wish Zach would do 28 Months Later.