Man, I don't know how I missed this!
I recently began going down a similar thought process: Discordianism and other types of meta-religions being the natural next transitional phase after Nietzsche's version of nihilism, such as is portrayed in "The Madman." The transition from nihilism to "moral self-sufficiency" and "self-assigned purpose," individually and collectively, would be nearly impossible without meta-religions ("self-aware religion" is a phrase I like to use. A religion where the followers are fully aware of its natural origin, and the "doctrine" of such religion acknowledges these natural roots itself) simply because, while "revealed" religion may be way wrong, we are accustomed to the general structure of traditional religious belief systems. We kinda need that type of structure, at least for now, while we acclimate ourseves to becoming self-sufficient. I mean, face it, if left to our own devices, as it stands now, we'd all just end up destroying ourselves (which I believe is what's currently happening). "Meta-religions" provide a desired structure, but puts the "power" in the hands of the people, instead of some imaginary absolute. "Meta-religion," or "self-aware religion" allow us to make the transition from cosmic pre-teen to cosmic young adult by allowing a gradual increase in responsibility (just like when a parent grants his/her teen an allowance and other responsibilities and the increase in decision making and such).
I mean, I'm just musing for now, but I'd planned to write a paper on it for my Philosophy of Religion class. If I ever get it done, I'll post it.