I have been reading about how the Warehouse quest from Balestrom isn't important. I have another idea that has yet to be proven because I have yet to finish the quest.
In the Celestian District of the Stars, in the Chantry there is a pad similar to the ones found on Triton Avenue in Wizard City. Since Celestia is the first storyline and there is supposedly five new worlds behind it, this pad should be an advanced transporter like the heart door of Bartleby.
If anyone can prove otherwise of my suspicions, please tell me.