I agree, it's a bit played out, though to be fair, there seems to always be some kind of zombie-related thing going on in the entertainment world.
You know what would be cool? A horror movie where Pokemon take over the earth and start massacring humans in a grisly fashion. It could be a dark, live action bloodfest starring Joseph Gordon-Levitt as Ash, all grown up. Emma Stone could be Misty, and James Franco could be Brock.