I can already tell you that will never happen. Islands are huge economic centers for farming and resources. Those are tied exclusively to royal cities. Even the upcoming black cities wont have farm connections. How could you think thats a good idea to allow infinite farm plots access to a random blackzone?I hear hideouts will be hard to remove. If so, it's then a question of how many hideouts small guilds make: if they flood the black zone with them, a large alliance will basically be playing whack-a-mole trying to remove them, possibly to the point where it won't be worth trying.
I'll add that I'm really hoping I can connect my personal island to a hideout instead of a royal city, because wherever my island is connected, that's home, and I want to be able to be home in the black zone.
Why not? Why should black zones be dependent in any way on the royals (which are the tutorial zones, as I keep hearing)? Besides, the big markets are in the royals. If you're making anything to sell, does moving islands to the black zone really make sense?
Moving my farming to black zone would be extremely cool for me: because it would mean I'd no longer be growing to sell, but growing to locally supply myself and my guild. That's far more immersive to me; mentally, I'd be based in the wilds of the black zone. "Going to the big city" would be dangerous.
Perhaps moving existing islands would be a balance issue, but if nothing else, I'd like to be able to buy and build up a Personal Hideout, with my own personal farm and building plots in the black zone, that I can connect to my guild hideout (and move to a new guild hideout, if needed).