Is this a good game idea?

I was wondering if this is a good idea, a first person, open world, zombie shooting strategy game. Where you have an area to explore(like far cry, skyrim, gta, etc) maybe even generated like minecraft. only it has cities and towns with fields and roads between. Then you can find weapons and resources in areas,(like most zombie games) and you use them to build things(like minecraft only, with simply barricades and survival things-aka motors, generators etc- and you farm your resources, command survivor npcs, and try to survive.) It would have 4 gametypes, survival(in depth strategy survival, arena(fight off waves until you die), realism(when you die in survival you lose your world), and multiplayer(with teamwork and betrayal and such). All with npc enemies and friends that you can trade with or kill. And maybe campaign down the line. It's would operate like a mix between cod and minecraft. when anyone is bit, they have a short while to do whatever before they lose(npcs disappear, players reset). The player has a limited size backpack and for large resources you have to carry them with both hands(drop if you're attacked, you can pick them back up). You would be able to remove a building using fire or by taking it apart and gaining more resources than by burning it. You would be able to choose the zombie types you fight(every movie/game portrays them differently). you could remove buildings for resources or to make space for other buildings. All during this you have a little guide with instructions. Basically it would be a zombie survival fps based on realism, not entertainment level(though it would be fun). Think Call of Zombie FarSimsCraft 3. Everything I went over was done in one game or another, but not all together. I figure me and my friends could make this, but would any of you play it?