Richard Kahui is believed to be ready to sign a deal to play in Japan, leaving the All Blacks dangerously short of midfield players.
Compounding the problem for the coaching panel, the Herald understands that Conrad Smith will not be available to tour Europe at the end of the year - instead resting and recuperating in a bid to rejuvenate himself after 10 punishing professional seasons.
Tamati Ellison, who established himself as the preferred back-up second-five last year, is recovering from shoulder surgery and is not expected to be fit until the latter stages of Super rugby, while hopes are fading that Sonny Bill Williams will return to the code next year.
With Cory Jane also ruled out for an indefinite period with knee damage, an important area of strength for the national team - depth and quality of outside backs - has been compromised before the season has even begun.
All Blacks coach Steve Hansen has been aware of Smith's plans for some time, which is partly why Highlanders' utility back Ben Smith was groomed at centre during the Rugby Championship and end-of-year tour.