I am not saying it will or that it is a good idea, there is a move it would seem to consolidate Sydney stadiums to 3 or 4. For those clubs not playing at one of them they will have a tough decision of move to one of them or find the money to redevelop their own grounds. The advantages of moving to a shared stadium are that you get a payment for playing there, have no maintained costs and better facilities for fans and corporates. The down side is the inconvenience of getting to and from it, especially as our game moves increasing fly to evening ko's.
I think you are placing far too much store in one DT article. That paper is considered a joke by most you know.