Originally Posted by
Minaah
if you'd researched a little bit, you'd see there are quotes stating that they definitely want it out and are trying hard as they can to have WoD released before late spring or early summer-- in fact, closer to early spring; probably late March or early April. So ... it most certainly won't be a whole year without new content. And am sure a few folks will get into Beta soon as I'm predicting early Dec closed Beta starts .. mid Dec latest.
source:
Warlords Release Date
Another MoP patch would delay WoD, so Patch 5.5 isn't going to happen. The entire team is working on WoD right now, so any more MoP content would slow down development.
Q: "Typically after you announce something it is another year, but we are at Patch 5.4 now. What content do you have planned for between now and then?" A: "Any content we do now will delay the expansion by the same amount of time it took us to make that content. We are completely focused on making the next expansion and will try to deliver that as soon as we can, hopefully on a shorter cycle than players are imagining, but you never know, we will have to see."
Q: "Typically that would be in the Winter of next year. Does that mean it is a goal to bring it in to Summer or Spring?" A: "Well certainly the goal is before that, but we'll see, it is very hard for us to predict."
Taken from MMO Champs front page, straight from the Q&A at Blizzcon