If you are to have a north American competition it needs to be binational, and at least 12 teams.
Toronto
Montreal
New York
Chicago
Los Angeles
Houston
Boston
Jacksonville
Philadelphia
Denver
Atlanta
San Francisco
But where would you find the players? There won't be enough surplus in the NRL or Super League. Recruitment of north American players for 12 clubs will take at least 10-15 years of hard work, starting in north American schools. So meanwhile start out gradually with Toronto, Montreal and New York part of the RFL transatlantic structure. Later when the number of north American teams in Super League has expanded to at least 6, with majority of each club north American players, think about forming a north American league.
Or you could combine our efforts to expand in France with our efforts to expand in North America and create a conference to SL that way?
We have a small group of French clubs in the mix (Catalans and Toulouse already, with Avignon, Carcassonne/Aude and Villeneuve/Aquitaine looking to join).
We have Toronto in NA, with NYC, Montreal and Florida possibly interested.
Drip-feed some of them into the English game. Then, when there's near 6, invite enough to make a 6 team conference with no relegation and cross-conference matches against the English.
Catalans, Toulouse, Avignon, Toronto, New York, Montreal.
Add one French and North American team every few years until you can split it again into a French conference and North American conference.