Agree Warriors would be fuming; they're unhappy enough about a potential CHCH team, let alone another one down the road.
But I can see the potential investor attraction in a hypothetical AKL2, maybe even the same ones considering CHCH. They'll see AKL as being a bigger market than CHCH (even if they have to 'share' it), its less union-entrenched than CHCH, and the current stadium review means there's a (small) chance of a new CBD stadium which would massively unlock supporter interest across the city for all codes.
I don't like it, but I can understand if there's bean counter interest.
And it'd be a huge shot across the bows for NZR. CHCH may be RU heartland, but a second NRL team in the country's population and commercial center would be the biggest fk you they could ever deliver.