Little birdie told me last night that Mike Baird plans to knock down the SFS and a new rectangular stadium (60k from memory) will be built where the parking is now, with training facilities to replace the existing stadium.
ANZ will also be demolished because none of the major codes want to use it, and training facilities (I think) will replace it. The person I spoke to didn't mention whether a new smaller stadium would appear somewhere in the Homebush precinct.

Interesting stuff, even if it would seem a long way off.