The harder part, though, will be managing their workloads once they are back. Super Rugby has become inordinately long and, with no pause for the June internationals next year because there aren't any, some players could rack up enormous game time.
For the likes of Aaron Smith and Ben Smith, that hasn't proven a problem in the past, but some others could end up drained and dented if they are asked to bash their way through 80 minutes of football each week on top of all the training that comes with it.
One of those under heavy scrutiny will be Daniel Carter. Now, at last, fully recovered and raring to go, he needs game time to find his form and confidence. But, given his history, it's important he doesn't play so much that he jeopardises further injury.
His mixed performance at Murrayfield last weekend, when he was out of sorts for the first 20 minutes before easing into a better game, sparked debate on whether it had been a wise idea to take him on tour at all.
There were others who pondered whether he may now face a bleak summer of brooding over whether he still has the game for test football.
Hansen, though, has no doubts about the man he still sees as the best No 10 in the country.
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"I think he's going to have a summer where he's excited because he has got through a bit of rugby in the tour and, at one stage, I don't think he could even see himself making this trip.
"He has reintroduced himself to things we are doing, he has a better understanding of what we are doing and how we are doing it and he's had some time against the States, some time against Scotland.
"He knows his body is OK and he just has to get into Super Rugby as soon as he can. Once he does that, we will see the real Dan Carter again because mentally and physically, he's in great shape.
"If you don't play your sport for a while, you are rusty but we have big expectations of him as well. His rustiness is better than most other people's top drawer so we expect him to have a huge Super 15."
There's a second issue with Carter. How will the Crusaders use him and Colin Slade together? Slade left the Crusaders a few years ago to get out of Carter's shadow.
It worked for him, earning his first All Black cap after playing a season at No 10 for the Highlanders. It was Carter's sabbatical this year that brought Slade back to Christchurch and they benefited hugely because Slade was superb.
But what about next year? Will it be Slade or Carter at No 10?
"I'd like to see them both playing first-five as much as we can get them," said Hansen. "It's a massive season and, with 18 or 19 games if they make the finals, there is plenty for both of them to get plenty of game time at first-five. I'm picking Dan will play some at second-five but, even if he does play there, that will be good for him, too.
"It's about getting on the park and getting minutes under his belt and being put under pressure and having to make decisions in tight situations. But I'm assuming Toddy [Crusaders coach Todd Blackadder] will play them both there because of the length of the season.
"You have got versatility on both those players. Colin showed he can play reasonably comfortably on the wing and Todd has used him there before and he can play fullback."
Hansen won't demand anything but will stay in touch with Blackadder, Slade and Carter and help them reach good decisions that work for the Crusaders, the respective athletes and All Blacks.
