There was another thread on this
include pacific islanders into the tri-nations Can a mod please merge the threads?
As others have said, adding the PIs to the 4N would not add a new broadcast audience that could drive an increase in value of the SANZAR deal. It would both increase costs for the SANZAR Unions, and demands on the players. I like the idea of a PI team, but
My suggestion is this:
Give the PIs, USA, Canada, Japan a third window to play tests (as the 3N and 6N get), and allow them to stage annual tournaments at the same time as the SANZAR Four Nations in September, where they can play an annual regional tournament. The IRB should extend Regulation 9 to require European and Japanese clubs to release players to these competitions, as they have done for Argentina's addition to the 4N. I'd suggest:
South Pacific Cup - Fiji, Samoa, Tonga. Each team plays 2 games
North Pacific Cup - USA, Canada, Japan. Each team plays 2 games
This would free up the June window, which Fiji/Samoa/Tonga, and and USA, Canada, Japan, could use the June window to receive inbound touring opposition e.g. touring 6N teams fielding A team or fringe lineups.
Furthermore, I'd suggest a combined PI team could tour three years out of four in November, perhaps mimicing the Wallabies and ABs schedule:
Year 1: combined team plays tests in tour of UK: England, Wales, Scotland. A solution to gaining buy-in from the individual PI Unions is that Fiji, Samoa, Tonga would tour simultaneously play 3 midweek tour games against British clubs/franchises. So Fiji could Bath, Cardiff, Glasgow midweek; Samoa could play Leicester, Ospreys, Edinburgh etc, while the combined Pacific team play England, Wales and Scotland on the weekends.
Year 2: combined team plays non Lions recipients e.g. in 2013, plays tests against NZ, SA and Argentina
Year 3: combined team plays tests in tour of Europe: Ireland, France, Italy. Fiji, Samoa, Tonga could play midweek tour games against Irish/French clubs/provinces. So for example, Tonga might play Leinster, Perpignan, Aironi mid-week, while the combined Pacific team play Ireland, France and Italy on the weekends.