Ok so can I rant for a second....
When I was a kid, I used to love building theme parks out of cereal boxes and one of the parks that I did was on Atlantis. The hub resonates for me with this theme. The three middle sections of the hub play with the theme of water. In addition, the three buildings in those sections are in water. Whether these buildings are attractions, carousels, restaurants, they all seem like they are about water is some form. The hotel even seems like it has an aquarium to me. I know that the center of the hotel being an aquarium is unlikely, but I can't help that idea popping into my head.
It was theorized by even Plato that Atlantis was a portal with a multitude of languages being spoken. The supposed technology that was found there would be far advanced than anything that was seen. I think it would be cool if they went with this storyline. Atlantis provides portals to other worlds.
I know it is ridiculous but you never know....