Zombies could be better if they were done like The Sims 1 & 2, NOT Sims 3.
In Sims 1, you could bribe the Grim Reaper to spare someone from death, but if you didn't pay him enough (or anything), they would come back as a zombie.
In the Sims 2, they had the aspiration reward Death Clock where you could call the Grim Reaper and pay a sum of money to resurrect a dead sim. If you didn't pay them enough, they'd also come back as zombies.
I could see them fitting in pretty nicely in a Happy Haunts pack :)
I never bought The Sims 3 Supernatural because I heard zombies were very annoying.
