Super Rugby cannot be considered in isolation, either. The Sanzaar alliance also includes the Rugby Championship.

Last year Roux appreciated the unlikely scenario of South Africa's franchises being based solely in Europe and the Springboks competing in the Rugby Championship.

"Why would Sanzaar allow us to pick the cherries and then leave all of our partners to fight for themselves? It's a pipedream for a lot of people. If I told [NZ Rugby boss] Steve Tew I'll see you for two months of the year and then I'll go pick the riches of the north it would be a very tough negotiation. Sanzaar would say go play in the Six Nations.

"That's a whole new conversation because we are only into the Celtic league at the moment. I don't see any of them allowing us in their competitions anytime soon so I don't think it's realistic."

Threats and rumours of South Africa moving north have frequently emerged over the past two decades.

Perhaps there is growing frustration with the long nature of tours – South Africa's four teams and Argentina's Jaguares make month-long ventures abroad compared with two weeks for New Zealand and Australian teams.

With broadcast negotiations looming, South Africa's option of moving north may garner leverage around the negotiation table and potentially lead to further format tweaks.

But talk of expansion into America is also understood to be premature, with Sanzaar weary of creating mismatches.