Alzrius
The EN World kitten
Ever since 3E, when D&D adopted a much heavier "whatever you need your campaign to be" attitude, it's downplayed specific cosmologies in favor of letting you build your own. I think 5E will keep that attitude.
Personally, I'd like a return to the unified cosmology of the 2E era (and also 1E, though it didn't flesh it out too much). In fact, I'd like this to flip-flop the current approach - say that the D&D "multiverse" is the Great Wheel, but that there are other cosmologies out there (home games), with minor expansion on this latter point.
D&D can't be all things to all people, and it shouldn't try; it's that philosophy that's fractured the fan-base so badly. Give it a specific setting, albeit one so expansive and large as a multiverse with dozens of planes, and let those who want to set their games in a different cosmology do what they do best: world-build on their own.
Personally, I'd like a return to the unified cosmology of the 2E era (and also 1E, though it didn't flesh it out too much). In fact, I'd like this to flip-flop the current approach - say that the D&D "multiverse" is the Great Wheel, but that there are other cosmologies out there (home games), with minor expansion on this latter point.
D&D can't be all things to all people, and it shouldn't try; it's that philosophy that's fractured the fan-base so badly. Give it a specific setting, albeit one so expansive and large as a multiverse with dozens of planes, and let those who want to set their games in a different cosmology do what they do best: world-build on their own.