Another question… since i can’t find anything about it 
i feel bad for asking so many questions…
As i understood from the blue post Warbands will merge your entire Battle.net account, all licenses included
Does that mean we will be able to make 1 warband for all your licenses and use your warband bank for all? so 1 central bank for all licenses?
If so that would be a giant QoL improvement!
This at least implies that most features like the bank are shared BNet account wide.
The one exception is if you have multiple World of Warcraft subscriptions within one Battle.net account. In this case, you will only see the characters on the account you’re logged in to, even though all your characters across subscriptions are included as a part of your Warband.
Source: https://worldofwarcraft.blizzard.com/en-us/news/24115313/get-the-band-together-for-warbands
Oh sweet!
So ye, still seperate logins… which makes sense ofcourse because multiple licenses.
But one bank for all!
Massive W.