It’s just a shed essentially and they build under the big roof (in simple terms). They gutted it when 9 picked it up. The videos look horrific but nothing a bulldozer can’t fix .
I don’t see it returning to Dreamworld even if it did come back though. It could be done cheaper elsewhere IMO.
Endemol did do a rebrand of the format identity worldwide recently and interestingly Australia is used in the branding. This could
Mean something?
https://theplant.co.uk/project/big-brother-rebrand-hes-watching-you
As much as I’d love the show to be back and have said before, comprising streaming, social media and multi channels to their full ability it could be a real success. I anticipate they are just talking of The Mole though.
But hey… 10 if you’re doing Big Brother, appoint Amanda Keller as host 
