This isn't perfect but using an elliptical tool in Photoshop and following what looks like the new fence line at the Northern end I came up with this:
http://imgur.com/Tb2b1
Measuring that in Nearmap I get 175m x 135m fence to fence or roughly 166m x 126m
Still a little narrow compared to Footy Park at 166m x 132m and the MCG at 162m x 140m all taken on Nearmap. However you can't be sure how much farther east they will go. There's a lot of room there so hopefully they do the right thing.
http://imgur.com/Tb2b1
Measuring that in Nearmap I get 175m x 135m fence to fence or roughly 166m x 126m
Still a little narrow compared to Footy Park at 166m x 132m and the MCG at 162m x 140m all taken on Nearmap. However you can't be sure how much farther east they will go. There's a lot of room there so hopefully they do the right thing.