But what they have following Jane's 25-minute cameo at fullback against Italy, is reassurance that they have a quality option in reserve. Jane's influence was enormous - game changing and inspirational. His vision and ability to see space and play others into it made all the difference.
He brought both Julian Savea and Hosea Gear into the game and it wasn't coincidence that the All Blacks, stilted and uncertain, were suddenly assured and direct after Jane was introduced off the bench.
"It was massive," said Savea of Jane's influence. "In one play he took out three defender. His ability to do that - was awesome for the boys outside him and you could see why he is one of the best wings/fullbacks in the world."
If nothing else, the All Blacks gained confirmation that a back three of Savea, Gear and Jane could work effectively and potentially lethally and will be probably their preferred combination if Dagg isn't passed fit.
Assuming that he is, though, a tough choice will have to be made between Savea and Gear. Jane is a given, with room for only one of the 'powerhouse' wings. Savea, in the way he continues to strike from limited rations, is probably ahead by a nose, but Gear's willingness to get off his wing and charge into the midfield makes him hard to leave out as that could be a critical way to build momentum against the rush defence of the Welsh.