I think it would be awesome to have a supergroup hideout. And the SG hideout can have a SG vault and it can have a AH store in it. It can have a training room where SG members can duel and stuff and test their abilities. The SG leader will have all the control for the SG hideout and they can set the permission to who is allowed into the SG hideout. It will be very interesting and I think a lot of people will appreciate it.