Yeah, FETCH is pretty rough.
In any case looking forward to a wacky zombie rpg. I mean zombies, different moods and worlds are also not mutually exclusive, right? If you haven't seen it, maybe check out Z Nation, it's made by the asylum but i actually really like it. They keep the zombies fresh and exciting by constantly changing up the forms, costumes and rules for the zombies. And, yes, there is of course a zombienado, sooner rather then later.
I can kinda see a dimension-hopping campaign, where the goal is to infect as many worlds as possible :D