Kae'Yoss said:
I very much doubt it. There are troves of fans.
I'm aware of that. But how often can they resell the same material to the same people? The current books are extremely high quality, for the most part, and extremely detailed. Doesn't there come a point where people say, "yes, it's nice, but I've already got it?"
I could well be wrong, of course.
Sure, they can use the old FRCS still. But from there it's not far to use the old core rules, too. BAM! Lots of people to stick with the old edition.
If 4e is significantly different from 3e, then I'm sure there would be a sizeable market for a new set of books. But if the rules are fundamentally the same, then I see less of a demand, and so less of a market.
And I expect the next edition to have essentially the same rules at its core, perhaps with fundamental overhauls of one or two areas. I doubt, therefore, whether there would be that huge number of people ready to shell out several hundred dollars on new versions of the same setting.
Again, I could well be wrong (about any of this).
It has one: the Forgotten Realms. Why re-invent the wheel and peter off fans along the way?
If they keep the Realms, then they would, of course, be mad to produce a new and similar world. However, if they don't then I can see a niche existing. The trick would be to make it generic enough to appeal to the masses, but different enough in the execution to not just be "FR redux".
Basically, the problem I see with the Realms is that there's now so much accumulated lore that it's nigh impossible for a newcomer to get into the setting, especially when confronted with experts. Sure, there's an emphasis on "making the Realms your own", but that only helps so far. And can still leave newcomers floundering.
It's the exact same problem any new Star Trek series faces - so much exists already that it's hard to go forward. At some point, it becomes better to do a reboot (start a new setting) rather than try to continue accumulating lore.
And, once again, I could be wrong about all of this.