That was what I first expected to do, back last year when I cancelled. "I'll be back for the expansion". But as I've basically detoxed myself from WoW, I've felt less and less interested in actually playing the game. The only thing that was mildly interesting would have been the Tower... and then I realized I no longer trusted Blizzard to make it work. Already, its endless content is Dungeons of Norrath redux (make a few maps, place strategically walls to close off sections), they fumbled quite a few time showing off their hand early ("you've been in this tower too long. Now GET OUT, so we can recycle the instance.").
So... pass this time. And probably the next time, and the time after. Even if there is no MMO worth playing at the moment (I hate action combat asian "MMOs").