No decision has been made. We generally focus our development on a topic for a while. We start by getting input from the community - thank you for posting. Then, we think it through, we figure out what to build and how to do it. A few more ideas usually surface during the process. We build, then we test. Then, we get feedback and make changes based on feedback. The whole process was on display last year over the player housing feature. We have not started the "intense phase" on supergroups yet.

We intend to have supergroups and supergroup bases. We are open to coalitions if the community wants it. Everything else is open to input.

JestersGhost said
Any plans for coalitions, ie. groups of supergroups? Helpful if you max out a supergroup, or want to have several themed supergroups for your alts, etc.  

We are open to the idea, but we have not coded it yet.

Gerald_Deemer said
So we will be able to form supergroups with other players. We even can use the same supergroup-house/hideout whatever you call it.
Is there a final decision about the supergroup size? How many players will be able to join?
And can we rename the ranks within the supergoups and create our own ranks?  

There will be supergroups and they will be able to share a base. This feature has not been activated for the Beta. No decision has been made on the maximum supergroup size and we will poll our community before making a decision.

You will be able to rename/create your own supergroup ranks.