From what I've heard, keeping unused sets--even broken down in pieces and kept in storage--costs a lot of money that only gets more expensive as time goes by. It might be actually have been cheaper (in the long run) to trash the sets and then just rebuild them once it was official production would resume. Yes, it doesn't make sense, but that's Hollywood economics, IMO.Do the sets still exist?
I find it difficult to believe, with the streaming contraction and reduced amount of money available compared to a few years ago, that they'd rebuild everything from scratch if they don't.