Crystal Tower - Large PVE content theories

Has there been any discussion about this..theories or cool ideas floating around?

Please feel free to say whatever you want regarding the crystal tower :O

Begin.

Hopefully it's something like a survival tower. Beat the enemies on each floor to continue to the next, going as far as you can without dying. That or at least let us save after so many floors. Put a boss after a set number of floors, it's a pretty proven strategy. Hell SE even did it with KH and the Coliseum, though it was presented slightly differently.

I'm hoping for some Nyzul style awesomeness.

multi tier area with bosses and mobs along the way. maybe an item to hold a place in the instance for groups wanting to go back that dont have time to knock it out all at once. interesting npcs and quests inside that maybe give buffs or debuffs if done or not done correctly.

just throwing some ideas out there lets see where this goes.