I'll admit I likely underestimated Classic's potential. (Don't tell @Akka, he'll screenshot this post.) That said, as BlizzCon has demonstrated there seems to be a non-existent drive to focus on additional Legacy content. (TBC/WotLK is possible but if Classic+ was even the faintest possibility I'm certain it would've been mentioned at BlizzCon.) Even if Classic has "beat" retail, what does it prove? The best case scenario is that eventually a certain percentage of Classic returnees convert to retail players. At the end of the day, everybody's paying the same fee to play the same game... there doesn't really seem to be any upshot for "winning" the retail vs. Classic argument aside from smug bragging rights.