"With some rest Ma'a will come right and we have to be mindful of that," coach Steve Hansen said.
"He might need a rest and that would freshen him before the Springboks the next week."
Settling on a midfield replacement for Nonu offers several thoughts after Crotty came out of the cold, on to the bench then ANZ Stadium in Sydney for a test substitute debut.
He played strongly and with his usual work alongside Carter at the Crusaders, the selectors may decide to persevere with that partnership.
Originally Francis Saili was the squad back-up for Nonu but he damaged his ankle in a hitout match in Wellington and Crotty got the call and the test cap.
Saili recovered and played strongly for North Harbour in this week's ITM Cup action against Wellington. He offers an exciting shift in style with his nifty footwork and ambitious offloads.
Whether that translates well to the international stage and whether he is still rated ahead of Crotty will unfold next week.
If Franks is not fit enough to start at tighthead, Blues prop Charlie Faumuina should make his ninth test appearance against the Pumas.
Training squad members Saili, TJ Perenara, Jeremy Thrush, Slade, Crotty, Luke Whitelock and Frank Halai played for their provinces this week while Keven Mealamu, Charles Piutau and Sam Cane play today and Ben Franks tomorrow.
History, said Hansen, showed that most players were a bit rusty when they had time off but there were always individual cases like Nonu to consider.
The All Blacks had to respect Argentina, maintain their Rugby Championship standards and be consistent with their selections.
"That's the broad idea but one or two players might be different," he said.
Hansen confessed he did not have a great deal of intelligence on Argentina.
The All Blacks had all the video on their work last year and in two tests with the Springboks this season.
"They are very combative, they are spoilers and they hoe into things," he said. "They made a much better job of their return game with the Springboks."
If Daniel Carter showed he was fully fit after his recent calf problems, he should start his 96th test in Hamilton while reports about Beauden Barrett and Liam Messam's fitness were encouraging.
Neither Aaron Cruden (knee) nor Tom Taylor (rib) would be fit for some weeks and there was some doubt whether Cruden would be fit for offshore duty against the Pumas and Springboks.
