The Auckland stadium shuffle comes with another warning - music fans will face bigger ticket prices to see big acts in the city.
Mt Smart Stadium - which has hosted giant gigs by the Rolling Stones and the Eagles in recent months - will have its 47,000 capacity slashed by 10,000 seats when the venue is transformed into the new home of speedway.
Veteran music promoter Phil Sprey from Capital C Concerts has staged stadium shows in New Zealand for Bon Jovi and Elton John. He said if concerts did remain at a new-look Mt Smart, premium tickets for superstar acts that played at the venue costing $500 could rise to $750 or more, $200 tickets could become $300, and so on.
"The artists and promoters will want the same returns and the only way that could happen on a reduced capacity would be to increase ticket prices to the level where they could cost crazy money."
The Herald on Sunday understands that issues getting consents for night-time events at Western Springs meant it was unlikely to host some gigs Mt Smart could no longer put on. Independent promoter Ian Magan is staging a gig by rock giants AC/DC for 55,000 fans at Western Springs in December. He said a reduced capacity at Mt Smart would significantly affect its viability as a music venue.