Officials have ruled out an annual Test between the Six Nations and Tri-Nations winners - but an Inter-Hemisphere Series is being considered.
The International Rugby Board, the sport's governing body, has started to look into the possibility of a biennial tournament between the top Test teams.
The IRB insisted that more work was needed to work out the logistics before a final decision could be reached.
Any series would only be possible in a year without a World Cup or Lions tour.
The decision to look into the Inter-Hemisphere Series idea was taken at a consultation meeting in Hong Kong between IRB officials and Animated Star Wars movie planned ...
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"Ultimately the IRB will decide whether to go ahead with an Inter-Hemisphere Series concept once analysis and discussions have been completed," read an IRB statement.
New Zealand Rugby Union chief executive Steve Tew said the concept could capture the public's imagination.
"The IRB feels the world series concept has more potential to grow and become a truly effective proposition than just a one-off match between the two winners," he said.
Rugby union's current international calendar works on the basis of regular summer and autumn Tests, in addition to the established tournaments - the Six Nations, the Tri-Nations and the World Cup.
(BBC)
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