Seeing all the leaks here in the past days, let me tell you none of them are right, but i had a ton of fun reading them
I have been saying these stuff here and there (mostly in private convos) since we started working on the expansion during BFA.
The Dragon Isles were supposed to be the 8.3 zone during the planning stages but that was quickly scrapped before the release of the expansion and we started to convert and merge it with our 10.0 plans.
The lore is something along the lines of „coming out of hiding”. The isles were hidden from the rest of the world but due to some calamity,
which will be revealed at the end of Shadowlands i think, they are now exposed to the rest of the world. The inhabitants are human-dragon hybrids of various degrees. Dragons are also in the isles naturally but they aren’t related to the dragons we knew before.
The isles themselves are very „nordic”, and are placed on the world map somewhere between Northrend and Eastern Kingdoms. There is a tundra zone called Fjolkivak Riverlands, an arctic swamp called Utragosla, and a fully snowed iceberg zone called Aurora Glaciers. There is also a mountainous zone but the name is probably not finished because it’s literally called Mountains currently. These 4 are the leveling zones. There is 2 endgame zone currently planned for release. One of them is called The Eye. It’s in the middle of the isles and is a huge dragon temple but there aren’t really any content there besides story quests. The other is called Volyrium which is a seperate isle off the coast of the isles and it’s basically one big city. It’s rulled by an eternal emperor. This emperor is one of the main baddies in the xpac. There is also a little zone which is basically a dungeon but is accessible in the open world too, because there is a quest to unlock the dungeon.
The main city is a small isle and is sort of an outpost-town thing. There is also an emerald grove in the city with a green dragon living there, probably a „ruler” or something like that.
Kalimdor and Eastern Kingdoms will get a visual update, but only a handful of zones will have a place in the story, the rest of them are purely graphical updates. Northrend and Outland updates are planned for later patches.
The first raid currently has 9 bosses and is located in Volyrium, but i don’t know the names of the bosses because they have placeholder names. There is also a mini raid planned to release in the following weeks of the release in the 10.0.5 patch, located in the mini-zone mentioned earlier. 10.1 is also planned to release in the quarter-year following the release, but not much has been currently revealed to us about this patch. There are 11 dungeons currently planned for release, but there are talks to postpone one of them until 10.0.5.
There is no new class, no 4th spec, no tinkerers, dark rangers, dragonsworns or anything like that. 2 allied race are planned to be released during later patches, but that is just an „inside-rumor” currently and is not 100%.
Housing has been talked heavily and is in a pretty advanced form. They are still debating wether to release it with the expansion or in a later patch.
I know that gearing will receive some extras. I’ve seen an early iteration which had a gear-piece with a passive ability on it and it could be upgraded with a currency. There was also a class mastery gem-slot in it but i don’t know much about that.
I don’t know anything about when will they release 9.2 or when will they plan to announce the new expansion, all i know is that it’s „soon”.
That is all i know about it, some of them may change until the release. Believe me if you want, just wait and see.