I really believe this could be the beginning of a European based league competition.
Some possible teams that have been mentioned in this thread - Toulouse Olympique (no more than five years away from being an ESL team), FC Barcelona (the league team is an arm of a strong sporting empire - I'm sure you'll all agree Barca has done okay in soccer, they've got some money to throw around), Catalan Dragons (they've done okay, and would be better off playing in Europe), Rotterdam Spartans (if their plans come to fruition they will be a model franchise in any sport). Heck, you could probably throw in the London Broncos (they've already made changes and one of the areas they've already acknowledged as lacking previously was marketing. Some of you probably wouldn't mind if they left). And you know what - how about a team from Wales (the Crusaders could probably be reborn, and, if they followed the marketing strategies of their new group, would likely do very well, thank you very much.) There's six - two to four more teams and you might see the ESL slip to number three behind the NRL and this group. Just sayin'.
Oh - if ten years is a magic number for Rotterdam, who is to say in ten years time a strong competition couldn't be formed in North America. Again, as sheepbender says about the above group, given time, money, marketing and knowledgeable people, why couldn't a North American comp eclipse them all.