3 new zones? Nope.
Thal'dranath was the name of the zone they originally wanted to have as patch content for the Broken Isles. They then did the Broken Shore instead. Thal'dranath would have been more Elf stuff. You can see that reflected in the name. So why would part of the Broken Isles be an Elf zone?
Do you think they're not gonna do a level increase anymore, because they did the level squish? The point of the level squish was not to have the level fixed at level 60. It was to decrease the number of levels because it had grown too big. 120 was too big. 70 is not too big. Levels had grown too high. But that doesn't mean they aren't gonna increase the level cap anymore,
And Chromie Time means what exactly? Chromie Time goes from level 10-50 and Shadowlands goes from 50-60. Next expansion is probably gonna go from 60-70. Where is the problem with Chromie time here? They're either gonna add Shadowlands to Chromie Time and make it 10-60, or just add 60-70 on to it.
I think you're the one that hasn't figured out why they did the level squish and Chromie Time.
You think the next expansion is gonna be the first one that adds new content for the max level of the previous expansion? So a glorified content patch?