Obviously everything hinges on the TV deal, but I'd be happy to see the NRL and Super League (if they agreed) take a break for a month to have rep games.
In an ideal world, the NRL goes for 22 rounds, and after 11 rounds we have a break for rep matches.
QLD Vs NSW
NZ Vs England (alternate each year where it's held)
4 Nations Pacific - PNG, Tonga, Samoa, Fiji
4 Nations Europe - France, Ireland, Scotland, Wales
The 4 nations matches could be double headers each week, every team would play the other once.
As for the rest of the NRL, I wouldn't mind seeing the 7's or 9's brought back rather than giving players a month long break. Take it to varying growth cities (Perth, Adelaide, Wellington, Gosford)
Potential schedule
Friday Night
NZ Vs England
Saturday
Day 1 of 7's/9's ending at 5pm
Double header Pacific 4 Nations 5:30-9:30
Sunday
Day 2 of 7's/9's ending at 5/6pm
QLD VS NSW 7:30pm
Still get as much if not more league than a normal weekend, it grows and promotes the sport, and avoids players having to play multiple games in a short space of time, hopefully reducing burnout.
The only real cons are the fans who will say "we don't want the NRL to take a month long break" to which in light of the pros, I say f**k em.