You realize EQ just released its 19th expansion. No one plays it and its crap. WoW is not gonna die out any time soon. They have said countless times as long as there enough people willing to play they will make content. Of course it will not be top tier content with tons of patches like current if they get to EQ levels but if they are making a profit they will still produce for it.
According to these forums WoW was dead when the Cata losses hit. The it went back up to 10M+. It is still near 10M. For an 8 year old game that charges a sub fee that is amazing.