The All Blacks have been victorious in five of the six seasons since the competition transformed from the Tri-Nations in 2012 as Argentina joined the rugby party.
In that same period the Kiwis have added back-to-back World Cup crowns and suffered just three Test defeats in the last three years to confirm their long standing status as the best team on the planet.
However France, Wales and Australia have all pushed New Zealand close over the last 12 months - we might be clutching at straws - and the British and Irish Lions highlighted how you can upset them during their drawn series.
So let's take a look at how the four nations are shaping up and where there could be some value in the betting, despite having such a clear favourite as overall winner.