Would you want Northrend to be added ?

I never had a chance to properly experience Northrend. I wasn't around for WotlK Classic and I only wandered around as a lvl100+ in Northrend with a Retail character some years ago (and what a beautiful place it was). Since Forever got announced, I'm getting back to WoW big time, but I'm gonna commit only to Forever (not enough time to play other versions).

Northrend looks so cool, with so many dark and "zombie inspired" zones. I just love the undead and Scourge aesthetic in WoW. For me, Under City is peak and all the undead leveling zones are so so cool. So I really would love to see Northrend in Forever. I would love to expererience Icecrown with people, explore the flying ziggurats, and fight the sort of giant lich I saw somewhere outside in Northrend (don't remember who it was but it looked like Kel'Thuzad).

But.. I feel like Forever is supposed to be focused on the Eastern Kingdoms and Kalimdor first and foremost. Which is awesome, I have to say. I regretted in Retail how many places, sometimes entire continents, were empty because they got irrelevant and everyone was in the new current expansion zone (until the next one). A dead zone feels so... sad in this game. I do want the world of Warcraft to be smaller, which if done right would make it feel more alive and somehow bigger. Buuuuuuuut... what about Northrend ? Do you guys think a third continent would be too much ? How could it work ? Could they make it work somehow ?

I also think Northrend was designed with flying in mind, and I do NOT want flying to return. So, is redesigning Northrend possible or too big of a task ? How about, pieces of Northrend from time to time, like a slow progression ? I mean, the Lich King is there... and the Lich King is so iconic, I hardly see them ignoring him.

Also, a little unrelated (or not ?) but what about Naxxramas ? Is it coming back ? I never did this raid but it looks peak (don't know much about the gameplay itself but damn does this necropolis look SO COOL and the bosses inside are so badass, I wanna fight them some day). I know Forever isn't supposed to do exactly what Classic did and it will have its own story in its own timeline, so many things will be different. But man... I want Scourge stuff. Scourge is so cool.