A station at either McEvoy St or Green Square could form part of the new Sydney Metro railway currently under construction according to NSW Government plans. These plans show a range of potential alignment options considered for the line between Central Station and Sydenham, ranging from a Western alignment through Sydney University and Newtown through to an Eastern alignment through Waterloo and Green Square. The Government recently decided that the line should pass through Waterloo, rejecting the Sydney University option. However, these plans pre-date that decision.

Maps of the potential alignments show that a line through Waterloo could go directly to Sydenham, but could also potentially continue South to include an additional station either McEvoy St in Alexandria or Green Square where an existing Airport Line station is located. A station at Green Square could allow for easy transfers between the two lines outside of the congested CBD. These stations have not been mentioned previously by the Government when discussing either the Sydney University or Waterloo options.

The Sydney Metro consists of two stages. Stage one comprises the former North West Rail Link from Rouse Hill to Epping together with the Epping to Chatswood Rail Link, which is scheduled to open in 2019. Stage two consists of a new tunnel from Chatswood to Sydenham together with the conversion of the Bankstown Line from Sydenham to Bankstown, which is set to begin construction next year and open in 2024. The line will operate with driverless single deck trains with limited seating on a frequent turn up and go style timetable.