There's been a lot of to-ing and fro-ing with Auckland's stadium strategy, and still no real direction.
If a new stadium in the CBD proves to be too tough to pull-off, maybe (MAYBE) the powers that be should look at redeveloping Mt Smart as the premium rectangular stadium, capacity 50k-60k, with a 25k "club mode" option, and work towards Eden Park as a cricket ground, reducing the seating THERE a little (say to 40k-ish) but greening it but adding a few trees/embankments etc that's more befitting of a cricket ground?
Warriors can play at Eden Park while Mt Smart is rebuilt, then after Mt Smart is re-opened cricket can either be played in a temporary venue (Eden Park #2 ground?) or just do Eden Park #1 redevelopment as a bit-by-bit thing.
After all, once the City Rail Link is operational (2026?), it should help a lot with transport to/from both.
I tell you what I would do...
As soon as the new Te Kaha all weather in door Stadium is opened in Christchurch in April 2026 I think, I would negotiate to play there in 3 year blocks. I would sneak off like the teams in the NFL do and tell the NRL and Auckland Governments that while you dick around and don't build the appropriate Stadium infrastructure(new Auckland harbour side stadium) then we will not waste our time and leave money on the table waiting.
Build it and we will come back, otherwise we will be the New Zealand Warriors playing out of the salubrious surroundings that is Te Kaha. They can't lose either way. The new corporate boxes and support that they will generate money wise alone will guarantee success.
If the warriors are winning games like they are right now there would be sellouts all the time and it would probably become the new sporting holiday weekend destination for a lot of visiting opposition fans from Australia too. The roof aspect and city location would also be a major lure and guarantee no matter what the weather the fans will always be comfortable and in a luxurious sporting hotel of sorts with an abundance of atmosphere. Which is all part of the holiday experience that they are paying and craving for. Even wives and girlfriends like sporting events, which is what this will become for the city and its visitors.
Winning!
I don't think it would be all that long to be honest if the Warriors had the balls to do such an audacious thing that the NZ/Auckland Governments would quickly come to an agreement and stump up the funding for a new stadium quick smart. The people of Auckland and the surrounding areas will see to that very vocally I'm sure. No major city wants to be the second string banana do they? Auckland will be losing out on so many events by comparison. The roof is a game changer. Concerts and sporting events will be clamoring with the guarantee of no more washouts and being in a state of the art brand new facility.
In fact if I were the NRL/Warriors I would start to agitate now. Make it known that the possibility is there and it is a real option should the Government keep shelving a new stadium harbour build indefinitely and to show we mean business I would schedule at least half the seasons home games there in the first year of Te Kaha opening, with depending on the Govs response, full seasons games from then on till something is done if ever.
Like I said, win, win for the Warriors and even generating new fans further a field.