A thing that doesn't work in a "Belief is power and shapes reality" setting:
A dead god returns. Nobody worshipped him anymore. Those that even remember him consider him dead and gone. But yet, he does. How can he ever get back to "reality" if that would require someone believing in his return?
The hidden truth about the origin of the world (or another, important thing). Nobody knows it anymore. But there are still some ancient texts speaking of it. The texts were gone, and nobody expected to find the. But digging up the ruins of an old temple unveils some of them, and unveils a terrible secret that no one would have believed.
How could such a scenario work without anyone already knowing about it and believing it?
Well, firstly, belief doesn't have to be the ONLY cause of reality in the multiverse.

It's quite possible that gods animate and ancient texts exist totally independent of what people believe to be the case.
But the bigger matter is mostly: how does it affect the game?
IMXP, the consensual multiverse model means that you can go slay demons in a million different hells and it never gets old. That you can fight waves of a billion different types of angels and they all look different. That you can go to heaven and be reincarnated, both.
A more authoritarian model of existence wouldn't have that level of wiggle-room.
Not that one is necessarily better than the other, in my mind, just that a consensual multiverse gives you an open playing field. Others can be appealing in their own way.
Shemeska said:
We might, but my question then is would we recognize it? Planescape doesn't conform to a number of baseline assumptions that 4e design has thus far forced settings beyond the core PoL to change, massively if needed, to incorporate and fall in line with. You'd have to be able to return to the massive amount of lore that 4e dropped off of a cliff and made a ton of changes to, and even incorporate material that according the 4e's marketing and even some designer comments was bad or even the antithesis of fun.
Of course, I hold to the view that 4e's cosmology is "only a model" and that everything that was once in PS is still out there, even if they don't write anything about it.
It works pretty well...I'm looking forward to my PS4e campaign. I might do it via MapTool, so if people want to get in on it....
