Wouldn't it scream a controversial outlet of interest? I think it's a great title.
I could picture a box with a zombie-like pony in it with random accesories like raggy garments to dress it up in and a broken comb to brush out what little mane (or tail) it would have on its head. Demon Donkeys would have a anti-Bible book, have dark symbolic "cutie marks" and have vengeful-loking eyes that will increase nightmare fuel for weeks. And there would be names like "Liver Undead", "Brainlez Zombony" or something like that.