Are we really getting a sequel to this thing? Really? Why though? Can't we just pretend this whole World War Z movie thing never happened, maybe reboot the idea as a series on HBO and actually adapt the material from the book? I'd actually be interested then, but more of this super fast zombie, Brad Pitt nonsense? No thank you.
Even taking the director into account, the first movie already changed so much from the books that its pretty much impossible for the sequel to repair the damage unless it just completely ignores the first one.