If it's another puzzle hunt, it's technically "evergreen" as it is built off the last one.
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How do we think SMC phasing will be handled in Midnight?
A) New EK that is Cata EK + Midnight QT Area (EVersong, SMC, Ghostlands, Zul'aman, etc)
B) New EK that is Revamped Midnight EK + Midnight QT Area
C) Cata EK is still separate and Midnight QT Area needs to be portaled into and is disconnected by a loading screen (lore reason, maybe a void or arcane bubble?)
I was thinking that it may feel very odd for Midnight QT to be built with Dragonriding in mind, but not the rest of EK that you can fly to. Maybe part of the "twist" of the expansion is that the entirety of EK is being revamped, even if it doesn't have quests or content?
If the entirety of Northrend is being revamped for TLT, it could stand to reason that EK could be as well.