Nope, no official talk of when, it was just shown as a proposal on the expansion plan. But apparently there's been talk of adding a new tour attraction (on other sites) that would open in 2015, after DM:MM and before WWoHP. Just speculation of course. Would be great to see, but let's wait to hear
Other talk is, of course, updating or replacing Fast & Furious.
Whatever addition we see, I'm hoping it's not 3D....although I wouldn't be shocked...