What they may look to implemet may be a block format but they may just release a core set that they can recycle and add cards into.A basic set for anyone. IE core set in magic.
But I think they are gonna need to start thinging of implementing stuff by the end of this year because they are putting out so many sets out so quickly. I want to see the game thrive but I dont want it to turn into Yu-Gi-Oh. (where every other day they seem to release a set of cards to suck money outta people). I also see it being very hard to cycle some cards out without toatly destroying certian talents/builds as they have to follow the abilitys as close to the real game as close as possible. Mind you the day an arms specced warrior cant mortal strike or heroic strike ill be rather pissed.
I cant see them recycleing armor but I can see them recycleing abilities. Im figureing they will end up releaseing a "core set" every year to keep Class abilities in the game but I can see everything else cycleing out.
Have/Want I am a Faunt of useless advise!!