All Blacks full-back Ben Smith could be rushed back for the Highlanders' Super Rugby quarter-final at the Crusaders.
Brodie Retallick will take a two-year sabbatical from New Zealand rugby following this summer's World Cup in Japan.
Global rugby chiefs face a deadline of Friday to back or shun World Rugby's Nations Championship plan.
New Zealand Rugby and the Crusaders have opened investigations into two allegations of inappropriate player behaviour in South Africa last weekend.
Sonny Bill Williams has enough credit in the bank to only need to prove his fitness to put himself into World Cup contention, says Steve Hansen.
Sam Cane could make his Super Rugby comeback for the Chiefs this Saturday after recovering from a neck injury.
Liam Squire's comeback has been delayed after "personal issues" ruled him out of the Highlanders' South Africa tour.
All Blacks winger Waisake Naholo has signed for London Irish from the Highlanders, the soon-to-be Premiership club announced on Wednesday.
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