Steve Hansen will name 28 players on August 5 for the Rugby Championship and the expectation is that Blues prop Charlie Faumuina will be the one new cap.
Cory Jane will return, Jarrad Hoeata may be an interim replacement for Ali Williams and Zac Guildford and Beauden Barrett will drop out.
The biggest call to be made will be at loose forward, where Hansen has to decide between Adam Thomson and Liam Messam. There will be room for only one and the picture has been clouded by the quality performance Messam delivered in the third test against Ireland and again for the Chiefs against the Crusaders on Friday night.
Thomson, a reliable and durable performer who can and has featured across the back row, was ahead of Messam when the squad was initially picked to play Ireland. Injury reduced his impact and game time in the series, while Messam, not originally chosen, was called up for the final test. After years of false starts, he delivered exactly the sort of uncompromising, punishing performance that had been beyond him in previous appearances.
Thomson's greater experience, range and ability at the lineout are likely to see him retain his place but he's held off re-signing with the Highlanders until the squad is confirmed. If he's no longer required, he has indicated he'll probably shift overseas.