Ben Smith, clearly the All Blacks' top fullback, has been named in the No15 jersey for Sunday's test at Estadio Jose Amalfitani alongside wings Waisake Naholo and Rieko Ioane. If all three come through unscathed they are likely to start against the Boks at Loftus Versfeld too, with Damian McKenzie probably on the reserves bench after he left Buenos Aires due to a family bereavement.
McKenzie has become such an exciting player off the bench in the closing stages of tests he is beginning to carve out a niche for himself there and the 23-year-old Chiefs player could be a source of inspiration for Barrett.
McKenzie's habit of throwing intercepted passes, which received a training ground rebuke from Hansen as broadcast on Amazon Prime's documentary on the team this year, has been curtailed. He has learned to control his impetuosity and Barrett can too.
"He's 20 or 21, so he's not a very old rugby player but he's a very talented one," Hansen said of Barrett. "Sometimes you've just got to give them a bit of a go and it comes off. You've still got to get them to learn and sometimes you give them a go and it doesn't come off. That's when you put your arm around him and make sure he doesn't lose his confidence from the whole thing.
"Jordie is a project; he's got the potential to be very, very special. His game understanding for his age is understandably not that good at times. He can make the odd mistake but do some really great things too. It's a bit like when we first got Damian. He was all over the place. I described him quite often as a fly in a bottle. He's now settled down and has become very fluid in the game. He understands when to take risks versus the rewards that come with them.
"Jordie is still learning that. You don't want to knock the good stuff out of him, you just want him to learn when to push the button."
All Blacks team to play Argentina at Estadio Jose Amalfitani on Sunday at 11.40am, is:
15. Ben Smith
14. Waisake Naholo
13. Ryan Crotty
12. Sonny Bill Williams
11. Rieko Ioane
10. Beauden Barrett
9. TJ Perenara
8. Luke Whitelock
7. Sam Cane
6. Shannon Frizell
5. Scott Barrett
4. Sam Whitelock ©
3. Ofa Tuungafasi
2. Codie Taylor
1. Karl Tu'inukuafe
Reserves: Nathan Harris, Tim Perry, Angus Ta'avao, Patrick Tuipulotu, Ardie Savea, Aaron Smith, Richie Mo'unga, Anton Lienert-Brown.