I've already let 2/5 of my accounts expire, and I don't plan on renewing the other 3 until patch 4.0 is released. I'm assuming 4.0 will be before the expansion and contain the new talent trees. I'm not expecting anyone to actually know, but does anyone have an educated guess on when 4.0 will go live? (sorry if I'm using the wrong terminology - please feel free to correct me)