Rugby Football League chief executive Richard Lewis has played down reports New Zealand club Southern Orcas want to join Super League.
New Zealand Rugby League acting chairman Andrew Chalmers said they were considering the move after failing to get a National Rugby League franchise.
"The idea has been mentioned but I can't see how it could possibly work," said Lewis.
"I asked them to give us some details and I haven't heard anything since."
It would be a massive challenge, but whatever is good for rugby league is positive
NZ Warriors chief executive Wayne Scurrah
Super League plans to increase its numbers from 12 teams to 14 with the introduction of a franchise system in 2009.
Two years ago, the Orcas tried and failed to join the NRL, with the expansion place going to the Gold Coast Titans.
Chalmers said this was the reason they had turned their attention to the northern hemisphere.
"The point when the NRL chose to expand into Queensland, we started giving thought to what an alternative might mean," he said.
"This would increase the value of sponsorship and TV rights."
NRL team the New Zealand Warriors and the NRL are both said to have given their backing to the proposal by the Wellington-based side.
"It's hard to see where we would have a basis to object to it. We will watch further developments with interest," said NRL chief executive David Gallop.
"Good luck to them if it is something they think could work," said Warriors chief executive Wayne Scurrah.
"It is hard to contemplate the logistics, it would be a massive challenge, but whatever is good for rugby league is positive."