4 level up zones, plus the Drac'thyr starting zone, which will be significantly smaller, because they start at level 58. They will be about as big as Death Knight and Demon Hunter zones, if that.
So only 4 real new zones. Even in recent expansions, before Shadowlands, like in MoP, WoD, Legion and BFA, we've always at least gotten 5-6 zones. Now since Shadowlands (The Maw doesn't count), and continuing on into Dragonflight, the new standard is 4 zones.
We used to have double as much. WotLK had 8, not counting the 2 empty zones. TBC had 7, and if you count the starter zones as well it had 11.
And all of the zones look very bland to be honest. Everything looks like something we've already seen before.