Last time a director I liked tackled Mr. Purple Pants, he was Ang Lee. So understandably wary, even with del Toro's involvement.
Temis the Vorta wrote:
In both shows, the problem is the same: how to make this premise work without turning the cult members into dolts or zombies?
I think the solution is obvious, and pretty much there in the premise:
Make them fans
Putting the 'fan' back into 'fan'atic, after all. Take the crazy obsessiveness people can have over a TV show, and then just use those kind of personalities going murderous. (Copycat killing, then we see the fans afterwards critiquing it as if it's a bit of fan fiction that got some of the continuity wrong.) It could be pretty fun.