If I lived in Sydney (I live in Melbourne - but have visited Sydney enough to know sort of know my way around) and I had buckets to spend on stadiums I would build one at Wentworth park (we need a national stadium for soccer (kick the dogs out as Melbourne did from Olympic Park )) and build another stadium in Hyde Park (for union /league). Both would be handy to major train routes. We need a national soccer stadium and despite what parochial interests might say it should be in Sydney. Neither need to be as glamorous as the new Perth Stadium and an initial 50,000 capacity would do with planned expansion in the future. Lets face it these days NSW crowds only seemed to be attracted by freebies such, the mardi gras, new years eve fireworks, the start of Sydney to Hobart yacht race, free concerts on the steps of the opera house and surprisingly a walk over Sydney harbour bridge which you can do any day (imagine how many a horse race over the bridge will pull or not). Old newspaper reports tell me 50,000 used to turn up to Randwick every Saturday but not in the last 40 years or so. if Sydney is dreaming about big tennis the govt would need to find a billion or more for that so why waste it on tennis we you could have some decent central rectangular footy stadia.