I don't think you know what you're doing.
I don't think you know what you're doing.
Why does it need to be a three part series? Where did that come from? Your brief explanation of a plot barely even warrants a single film.
I'm not trying to deter you from writing as many movies about zombies as your heart desires, but please, please, please don't write a zombie movie for the sake of just writing a zombie movie.
Dawn of the Dead isn't just about zombies; it is about consumerism. Resident Evil may have started as a video game about killing zombies, but the story evolved into the classic man vs. machine drama. An amoral corporation (the souless machine) making human sacrifices for better profit margins.
Try re-evaluating what a zombie is. Your mention of organisms in animals reminded me of eXistenZ and The Puppetmasters.
Or try using zombies as a backdrop for another, more important story. For example, the love story in Shaun of the Dead.
Personally, I've always been curious why hunger is the only driving force in a zombie. If they're purely instinctual, shouldn't they also be looking for water and shelter? I don't think zombies are too stupid to get out of the rain. And are sexual impulses instinctual? Why have your zombies chanting, "Brains!" when they could also be shouting, "Fresh @$$!"