Where would you like TESV to be set?
We'll be assuming TESV will be released somewhere in the next 1-5 years, for argument's sake. We're also going to assume we'll be in Tamriel.
Important:
ANY province can have unique and original culture and architecture. Vvardenfell before the game was an inhospitable, lava filled, ashy wasteland before Morrowind. Lore can change in the games, though, we're assuming that the province will show signs of how the province has always been interpreted in lore. (unlike Oblivion) Morrowind, for example, has the Ashlands and Molag Mar Region to live up to the hellish expectations of Morrowind. The likes of the Bitter Coast and the Grazelands where added in to make the area more friendly for players. One big Red Mountain Region would get old after a few minutes.
Personally, I would love to see TESV be set in Summerset. I think the lore there is terrific, and we will see some amazing culture and architecture.
I would have voted for Black Marsh, but, after some thought, I've realised that a game 1-5 years from now wouldn't be able to convey Black Marsh well enough. I feel the dangerous lands and hist couldn't be portrayed well at our current technological levels. Perhaps TESVI or even VII, but not now.
Please don't take Skyrim's speculation into acount. No one cares if you're right or not.
How many provinces would you like covered? Remember to think of limitations extra provinces would create. I wouldn't want to see any more than one province. I would rather have one fully fleshed out province than multiple half done ones.
I'd actually like to see some kind of aftermath of Infernal City in Morrowind as an expansion pack.