The All Blacks are promising no let-up after putting the Wallabies to the sword yet again in the Rugby Championship opener in Sydney.
Beauden Barrett put the game out of contention in the second half from another Wallabies mistake and then when Israel Folau left the game injured and Australia were a man down due to his injury, Brodie Retallick sold a dummy to Bernard Foley to nearly walk in for the All Blacks' fourth try.
Folau fell awkwardly after an aerial contest during the second half of the 38-13 loss at Sydney's Olympic stadium and hobbled off the ground.
"We haven't done anything tonight other than get the right to put one hand on the cup and we've got to go back next week, work hard and earn the right to put the other hand on it".
Australia will now blood 23-year-old Jermaine Ainsley off the bench at ANZ Stadium for his Test debut in the hottest cauldron of world rugby.
"There was too much ball given back to the opposition, both from set-pieces and general play", Cheika said afterwards.
Polota-Nau slots straight back into the starting team despite not playing a Test since last November, and spending most of the year in England with Leicester.
Magnitude 8.2 quake strikes in the Pacific, near Tonga
A magnitude 7.0 quake on August 5 damaged tens of thousands of homes and displaced several hundred thousand people on Lombok . But it was less powerful than the deadly quake earlier this month and there were no immediate reports of deaths or injuries.
"So, yeah, I would imagine he would be there [but] we've also got Tom Banks, who's an out-and-out full-back so we'll see where we end up".
Cheika could also opt for inside centre Kurtley Beale to switch to fullback, where he has plenty of experience, and promote Matt Toomua from the reserves to the number 12 jersey.
All Blacks coach Steve Hansen lamented Crotty's "bad luck" to be hit by friendly fire and said a specialist had already given the midfielder the "all-clear".
Hansen, however, said they had to be wary of a wounded Wallabies side.
"Looked like he rolled it when he went up to catch so we will see after he gets a scan exactly what the diagnosis is".
But two minutes before half-time, returning All Blacks captain Kieran Read found scrum-half Smith to reduce the deficit to just one point and an onslaught of five second-half tries ensued.