It's funny that they're all so merciful to other costumed people, but they are so ready, willing, and (sadistically) able to murder and devour (though probably not in that order) everyone the heroes swore themselves to protect. I've been struggling to understand their mind-sets, but I can't. Hell, you'd think they'd try to stop the other zombies, or at least kill themselves... right?
And where is the police, the military, the nuclear assaults, and resistance groups? The zombie-verse Ash was able to kill an unknown number of zombies armed only with a shotgun and a chainsaw, you're telling me 4-6 billion people can't do anything except run and hide? And speaking of which, how is it possible for them to devour 4-6 billion people in a couple days? A thousand zombies or not, it would take them decades to devour every human... let alone every animal. What? Do each of them eat 100 people a day? How is that possible? Zombie-Bruce's stomach ripped open because he ate too much of Magneto as zombie-Hulk.
Also, I said it before and I'll say it again, all the costumed people in the zombie-verse are chumps. MZ vs. AoD was alot of fun, even if the first Marvel Zombies mini and Dead Days sucked... I guess I should blame the UFF arc that started it, too. I just wish it all made more sense.