I kind of doubt it, but I hope it is. I recently ubsubbed, because I've finished SoO on LFR and since I'm not part of a raiding guild, there's not much else for me to do except mess around on Timeless Isle which isn't holding my attention. I do want to finish the legendary quest, but it's not enough for me to pay $15 and I'm really stuck on one part anyway.
What do you think? Will it still be completable once WoD comes out?