Approval of Tasmania's stadium and AFL dream sits with a handful of undecided independent politicians, after the state's Labor opposition locked in its support for the venue.
Construction of a roofed stadium at Macquarie Point in Hobart is a condition of the Devils entering the AFL and AFLW in 2028.
Tasmania's Liberal government has championed the project.
Labor had declared unconditional support, but that wavered last week after a planning report recommended it not go ahead.
However, Labor leader Josh Willie on Monday confirmed his party would vote for the stadium when it comes before parliament for approval in November.
With Labor's support guaranteed, the stadium will go through the lower house.
It will need the backing of three of eight upper house independents to get the green light.
The report, by the state's planning commission, said the $1.13 billion stadium's benefits did not outweigh the cost and it was too big for the waterfront site.
The stadium was necessary for the Devils' success on and off the field, Mr Willie said.
"We support the project's approval because it will create desperately needed jobs and economic activity and give young people another reason to stay in Tasmania," he said.
"In our deliberations ... we considered the progress of the Tasmania Football Club and the cost to Tasmania with not proceeding.
"The power of Tasmania finally realising its dream of entering the national competition through the Devils cannot be underestimated."
Mr Willie said he remained deeply concerned about cost blowouts.
The stadium's price tag has risen substantially from the initial $715 million estimate, with the state liable for financial penalties if it doesn't meet construction deadlines.
It is expected to be ready for the 2029 season, with the developer last week warning the cost could go up if it isn't approved by the end of the year.
Anti-stadium group Our Place Hobart lashed Labor for being "cowards without principle or purpose" and not acting in Tasmania's best interests.
The Greens said Labor had committed to a blank cheque.
"Josh Willie and his Labor colleagues dodged questions last week, saying they needed time to consider the ... report before making a decision," Greens leader Rosalie Woodruff said.
"Their decision is to line up with the Liberals, at a massive generational cost to Tasmanians."
The planning commission report said the stadium would add $1.8 billion to Tasmania's overall debt in a decade.
The Liberals are expected to provide a response to the report in October, ahead of the parliamentary vote.
Upper house independents have said they want to see more information, as well as the order they'll be asked to vote on, before making up their mind.
Several have been highly critical of the stadium, while one has said she'd have difficulty voting for the project as it stands.
