I have read a theory out there on reddit, that they continue until they reach wotlk, and leave it frozen, in such a way that you have the first part of the game, until the big change, “cataclysm”, and this, right now pandaria, ends up reaching battle foz azeroth, which is another turning point due to the level issues, and therefore, you would somehow have the option to play… more or less… all the expansions…
I honestly thought Classic was going to end at Wrath and stay frozen since that was when WoW had 12 million subscribers and was the peak of the game. Seeing Pandaria coming makes me worried that we’ll get a trailer saying “You’re going back to Torghast” in like 2027 and I really hope not