Has there been any confirmation on whether or not roller/ice rinks will be something we can build?

The only response I've seen about the rinks thus far was from someone asking grant if they were objects or just popped up.

His response seen HERE was "They are an object, but also more than that."

I'm guessing this is something that will be covered in the Livestream so it's probably something they can't/won't talk about until then.