We just got back from a couple of weeks at the World.
You can see over the construction walls from the TTA, and to
be honest, it looked like they had a long way to go (sorry to
disappoint). Once we saw inside the doors of the old AE, and
it looked more like a construction zone than an attraction.
Plus, the outside que area has not even been touched and
the old "XS-Tech" sign above the doorway is still in place (are
they incorporating this into the new Stitch ?).
My humble prediction from the recent looks of it is Sept. will
be a stretch, later Oct. is more likely.