Chris Hyde/Getty Images
This New Zealand team have yet to prove absolutely that they are a vintage All Blacks side, though their record over the last two years is very impressive.
The World Champions drew the final Bledisloe Cup game 18-18 in Brisbane last October and were beaten 38-21 by England at the beginning of December as the demands of a long season finally caught up with them.
Those two blips aside, the All Blacks unquestionably have been the dominant force in world rugby.
None of their rivals can claim such an impressive record. The Springboks come closest having won 10 of their 15 matches over the same period, losing three and drawing two.
South Africa finished third in last year's tournament, and while they have won their last six Tests and have some exciting new talent, they appear still to be a team in development.
There is a new look about the Wallabies as well, especially in their back line, with new coach Ewen McKenzie making a number of changes since the Lions thumped Australia 41-16 in the final Test.
Argentina, meanwhile, need to show that they can offer more than a competitive forward element to their game. Second-season syndrome could well be a feature for the Pumas this year.