What about the Velvet Room part of this nexus? I don't believe I have ever been near such an area, and I've only ever seen my version of Joker enter such a place through a blue door. It's...not the prison he describes it as...

So, is it like a crystal, building on itself as more people enter, with the Velvet Room as the crystal seed?

[despite her shortness with Dove earlier, she kept asking questions. It was something Gogo liked to do, after all...]