Sydney's stadium plans are set to be overhauled with six NRL clubs close to agreeing to ask the Baird government to scrap a new stadium at Moore Park and upgrade the Sydney Olympic Park stadium instead.

In the past fortnight Premier Mike Baird asked the NRL for its opinion on the government's current plans to direct about $800 million of $1 billion in funding to replacing the inner-city Allianz stadium and $200 million to ANZ stadium at Olympic Park.

If the NRL and six Sydney-based clubs would like those funding levels switched to turn ANZ Stadium into a premium rectangular venue, the government is likely to agree.

That would mean ditching plans to build a new stadium at Moore Park, frustrating the powerful Sydney Cricket & Sports Ground Trust which would have to be content with refurbishing the 45,000 seat Allianz stadium.