Hard to say. The closed-off wing will still be in progress. They will maybe be starting to actually build the leisure pool. They'll be starting the cabins. There is a lot of very substantial work that is in the initial stages, given that permits on it all go through the end of 2017.
In theory, at the main pool, you won't notice much. If you're looking at a 1BR villas, there is a lot of work in the area of the villas, and if you intend to spend a lot of resort time but not at the pool you'll notice.
This thread has many more details, but the short of it is: Construction is substantial.
http://www.disboards.com/threads/wilderness-lodge-dvc-expansion-details-thread.3410778/