I heard that Zack is supposedly abandoning his visual talents in favor of a realistic look for this movie. I certainly hope he doesn't do that full on. What I mean is, while I prefer as much special effects (practical) being used as opposed to visual effects (cgi) and having a movie with a natural look and shoot on set as much as possible etc, I still want to see some visual treats that only Zack can bring to life. I hope he will balance the ´´realistic`` and the ´´artistic`` sides. I want Superman to stand out, literally, in every frame. I also hope we got a lot of classic imagery of Superman, both of him in action, flying, different poses etc. I mean the really visually impressive scenes that look like a page of a comic book comes to life. That's what Zack is the best at. So why hire him to do a Superman movie if he wont put those talents to use. Out of all the superheroes, IMO Superman lends itself the most to that kind of imagery.
But of course a large dose of CGI is needed for fight/flying scenes and such. That's why im glad they have WETA and Double Negative on the team (if the info on IMDB is correct). Don't get much better than that when it comes to CGI.