Eden Park looks set to remain Auckland's prime sporting stadium for decades, in new reports released by the council.
One report on costing, withheld from RNZ for five months, is inconclusive on the viability of a new downtown stadium.
The consultant's report, costing $930,000, says more detailed work is needed.
The council has blacked out possible locations and costs.
A seperate, updated stadium strategy, largely confirms the status quo for Auckland's major venues, apart from a possible new motorsport park.
Confidential negotiations continue over the council's guarantee for a $40 million loan held by Eden Park, and the strategy says further investment is possible.