Hello there from a world of chaos and creation. The USA, I mean. Anywho, I'm here to throw out a few idea that I've been working on, obviously. I mean, why else would I be here?
So, the first idea I had was for a cube of metal that would reform into its original state. That developed into the Foundry. No, it's not to be confused with the Factory, as that would be terrible. However, the Foundry is a warehouse full of metal working and shaping components. It can work with normal metals, but it can also work with imaginary metals, your "Unobtanium" metals, and they have the properties described from their respective source.
I also had an idea about a door way that lead to an alternate dimension, that was quite unusual, with a voice stating that "dreams can become reality, but for what cost". The door would open to a giant floating city, and yes, I know, giant floating island, how cliche— Oh well, I don't care. I had it formulating in my head for a few days now, ok?
But yeah, those are my two current ideas