I agree, Disney hasn't really acknowledged it yet. Star Tours, and Fantasyland are solid additions (as an attraction Star Tours is exceptional). They're adding to the area of Fantasyland with a beautification project of sorts, but unlike Carsland there is no anchor attraction included. The additions are all welcome but there isn't an attraction that is meant to "Wow" the guests.
If it happens, Avatar may present a single attraction capable of wowing guests, but we're 4-5 years away from that happening.
Disney needs to fast track something, that could be something like the Monster's Inc Coaster, but the only reason people are suggesting is that is because they know it exists. I also don't know that the Monster's Inc Coaster would stand up against the Gringott's Coaster, Hogworts Express or Transformers. I would think that something more substantial than the Monster's Inc Coaster is the direction that they should take between now and Avatar.