My major question, does the story have the people recognize the "zombie" virus as actual zombies? Or does it follow the trend of most zombie movies in which zombie movies/games/books never existed so no one knows what the virus is?
But so far, from your description Marter, Maggie feels like a movie pertaining to how a parent must watch their child waste away to an incurable disease (Cancer, some sort of genetic disorder, etc). Heck, can be any member of a family experiencing another wasting away from some form of sickness or disease. I'd say a pretty interesting take for the zombie genre instead of the usual zombies take over the world, straggling group of people trying to survive.
Well, to be fair I do see some acknowledgement of Zombies in Zombie cinema now, I'm pretty sure I've seen quips and comments outside of "Zombieland" with some regularity. That said my problem with most Zombie movies remains that they always seem to start where civilization has fallen without any real explanation as to how, just that we're supposed to take this for granted, usually picking up with survivors in the middle of surviving, or having the protagonist in a coma or something and missing the beginning. Few exceptions exist, and even those that do fail to address central issues like how exactly a bunch of zombies takes out a tank, which is one of the big problems I had with "Walking Dead" right from the beginning where it uses a tank with a zombie trapped in it as a major set piece.
That said I'll be avoiding this movie, it doesn't sound like my kind of thing. That said one would think that Arnold of all people would want to do a good action-zombie movie before he was forced into retirement permanently.
I'll also say that I eagerly await seeing people take a more occult angle on the whole Zombie Apocolypse as opposed to the virus thing. Using magic allows you to in a way answer a lot of questions, and what's more I personally think the "ciassic" type zombie is scarier than the Romero "headshot" zombies. I actually have an easier time seeing the former kind of zombies overrunning military positions (especially if the body parts keep coming) than the headshot zombies since the headshot ones still seem to go down from overwhelming damage, which tends to mean that I see no real reason why these things can say overrun positions with .50 machine guns. If the arms, or even slitering intestines, keep coming and trying to kill you though that changes the scenario, if you need pretty much total destruction then zombies become far more frightening.