Quoted from LesManley:
I would hope that they go towards a sound a like or better yet actual actor from the show. I overheard 3 casual players last night commenting last night during their game on route about how it sucks that a Walking Dead pin has no characters or voices from the show in it. It's not just hardcore pinside people, casual players don't understand it either.
It doesn't make much sense. The real pisser, though, is if you aren't going to have call outs from the show, don't make matters worse by using terrible custom voices.