The detail is there on the site with timelines:
https://sportandrecreation.nsw.gov.au/sites/default/files/Stadia_Strategy_Implementation_Report.pdf
Recommendation 1
Priority 1
Immediate
Construct a new dedicated rectangular stadium in Central Western Sydney with
a capacity of 30,000 seats to host Rugby League, Rugby Union, Football
matches and concerts to replace the existing Parramatta Stadium.
Priority 2
3 to 5 years
Construct Australias largest, dedicated world-class rectangular stadium near
the Sydney CBD with a capacity of 55,000 to 60,000 seats to host Rugby
League, Rugby Union, Football matches and concerts in the Moore Park
precinct to replace the existing Sydney Football Stadium.
Priority 3
3 to 5 years
Construct a 15,000 seat indoor sporting arena in or around the Sydney CBD for
major indoor sporting events including tennis, basketball and netball.
With the Sydney Entertainment Centre being demolished in December 2015,
and its replacement in Darling Harbour being a theatre style venue not suitable
for basketball or other sports such as indoor tennis, this closure leaves the
Sydney CBD with no major indoor sports facility.
Priority 4
5 to 8 years
Upgrade Stadium Australia with the installation of a roof to provide Sydney with
Australias largest roofed stadium, increasing the opportunity for content in
Sydneys largest stadium. Consider constructing retractable seating in the
lower bowl to allow for rectangular sports.
Priority 5
10 to 15
years
Construct a new dedicated rectangular stadium in Greater Western Sydney
with a capacity of 30,000 depending on present and forecast sporting and
event requirements.