I'm leaning on fake because the screenshots are playing it very safe. They look *very* good, just like WoW's style, but all of the assets look like something that exists, and the environments ressemble places that we've already seen.
The Dracthyr leak was something completely new that people even said it didn't look like WoW. Everything in this leak looks like something that already exists in the game, just reconfigured.

So, basically... before the clans split apart into the 3 we know (Bronzebeards, Wildhammers, and Dark Irons) they were all living together until the High King Modimus Anvilmar dies, resulting in a civil war conflict between the 3 Dwarf Clans over who gets ownership of Ironforge.
The Bronzebeards won, with the Wildhammers deciding to establish their own city in another tall mountain, Grim Batol and create a fortress that could rival Ironforge.
It didn't used to be a miserable place like how we found it in Cata... a lot of that is due to Modgud using Xal'atath to turn the shadows against the Dwarves, turning some of them into the skardyn.. resulting in Grim Batol becoming a cursed place of evil thanks to Modgud's curse. Forcing the Wildhammers to retreat again with half of the moving north to create Aeries Peak while the other half stayed in the area known as Northeron in the Twilight Highlands.
Source.

Eh, it's true that can be arbitrary, but it's more about whether those divisions inform biome diversity or story division.
The actual point though was in reference to a world revamp (which would benefit from the inverse, as was discussed pages back, with mega-zones) as compared to the gradual shrinking of zone numbers, while overall landmass has varied. That's something on a scale I just really doubt happening. I don't get a lot of ambition vibes from how they look at the game now and how heavily everything is managed and corporatized, somewhat understandably when we look back on what we learned about the older Blizzard.
Again, I would love to be wrong. I've just been hearing it as the anticipated focus for about 3 expansions of hype now. Everyone was certain that Zandalar/Kul Tiras achievement removal and datamined armor was a "red herring" because they didn't want to see it, everyone was certain about blue-eyed Bolvar/denying the general inevitability of the Shadowlands, and so many were certain that Dragon Isles had to accompany a revamp.



I took another look to at the Aerie Peak bird statue and compared again to the "leak". They don't really match. Some of the things I've noticed are:
-Wings are further back in the "leak" statue than the Peak one
-Head is held higher while Peak one is somewhat looking down.
-Chest is lower in the "leak" than the peak.
-Neckline creates a V in the "leak" while it's straighter in the peak.
-Slightly longer beak in the "leak". Even trying all angles around the peak doesn't reach that length. Image CAN be stretched though, so I wouldn't put stock into this point.
-Different feather texturing especially around the arm(wing?)pit area.
I don't think it's the same statue. it doesn't mean it's not fake, but the statue came from somewhere else.
Also, has the animal model in the 4th pic been found yet?



...that doesn't really mean anything since people can try to replicate those sorts of things because they also remember those same trailers.
It would be like saying "I'm 100% sure these screens are real because it says they're from Avaloren and it's really likely we're going to Avaloren" when everyone and their mom has speculated Avaloren.
Like how the leaked Dracthyr stuff showed the very best of that race/class, right?
Two examples above of terrible pro and con takes.

I don't get how people can look at Dragonflight and say "yeah, Blizzard is just phoning it in." This was an expansion where they totally revamped the talent system, made a significant update to how outdoor movement works for the first time in 15 years, completely revamped professions, made a significant overhaul to reputations, introduced a class with completely new mechanics, and for the first time ever introduced a spec mid expansion--and a spec that is so unique people often mistake it for being an entirely new role at that. They totally changed how M+ seasons work, which involves updating old dungeons and reworking entire boss fights/trash for some of the really old ones. They've totally changed how patch cycles work. They've completely revamped and unified gearing upgrades. There's been so much more iteration and communication in this expansion compared to the last 20 years.
Like, regardless of whether these things landed in general or for you in specific, you can't say they're not trying new things.