England and South Africa are currently the highest-ranked northern and southern hemisphere teams respectively
The Twickenham finale of next year's new Nations Championship event will pit the north and south of global rugby against each other in a contest to be the game's dominant hemisphere.
The biennial 12-team event comprises six rounds of matches across the summer and autumn Test windows before three double-header fixture days on 27-29 November at Allianz Stadium to rank nations and crown champions.
The results from the 'finals weekend' will also contribute to a parallel contest, to decide which hemisphere prevails overall.
The Six Nations teams will be the northern hemisphere representatives, with South Africa, New Zealand, Australia, Argentina, Fiji and Japan as their opposition.
