I thought there was some indication that they were at least clearing the land and thus preparing for construction. And, no, I don't mean relocating the M&Gs and FOTLK but the land further south (use for parking now, I think) where they had test balloons up a month or two ago.
That means next to nothing. They could spend the first half on 2013 pushing piles of dirt as social media whores try and get pics and it won't mean you'll ever see Pandora: Land of the Blue Sex Kittens that the US Military Wants to Murder to Steal their Unobtanium (with a name like that, they probably deserve it!)
You can even construct infrastructure and it means nothing at all (see: Flamingo Crossing).
Oh, and if anyone has specific DLR questions, please hold them for this weekend's Spirited Meet-Greet-and (for an additional fee) Gropes at WDW or my return from The Timeshare Kingdom of the World.