That's stretching the truth
Claims of a "new" London Heathrow lounge are rather creative.
Currently Air NZ is in awful Terminal 3, and uses the United RCC.
Next Easter, when British Airways takes over the new Terminal 5 and much of Terminal 3, ALL Star Alliance airlines move to a redesigned Terminal 1. There are only two existing Star Alliance lounges there - South African and BMI - and its simply a question of who Air NZ will share with. I'd be surprised if they built a 747-sized lounge for two flights per day.....