Originally Posted by
Jessicka
They pushed the movie back because they have more faith in it than they originally gave it, it has nothing to do with WoW expansion scheduling. WoD was always going to be a 2 tier expansion, and they've been going on about how the next one was in the works before this even happened; and given how lacking this one is, I find it very unlikely they'd waste development time trying to fix it, and cause delays and similar issues with a lack of content and features the next time around.
Again, with the work so far done on the next expansion, they're not going to rip up that plot just to squeeze another semi-tier in to give some kind of closure for Gul'dan - since he's probably the tie in anyway.