a realm reborn is still toyed to be sub based, been reading the forums for that, the producer is a big fan of blizz, so doubt it will turn into free to play from the get go, really dont understands peoples desire for free to play games and yet want to buy extra stuff.
The gaming experience is terrible with free to play models, played a number and its just dire, also makes those games a utter joke, the development of in game shop items take precedence over the development and improvements over the main game, if people think otherwise, they havent taken a analytic look at those games properly