The hub is looking like it's getting closer. First half should be done in the next couple months (FP area for Wishes viewing is coming up), then the other half is rumored to be quicker because the moat isn't involved, so it may be completed by this year's end?
AK looks like it's going in stages. They just opened a section of tree roots the other day. Avatarland though, not for a couple years I don't think.
DTD, same with the stages. Bridge should be open later this week, and other work is progressing right along, but it will be another couple years til it's all finished, it sounds like.
Epcot has most everything going on behind the scenes, so it looks fine.
And DHS, well, that's just beginning. Or rather, hasn't really yet begun.
Just to add, I'm glad they're investing in the infrastructure of the parks. MK has been so crowded lately that the hub expansion will be a very nice thing indeed. Avatar would not have been my first choice in a new land at AK, but some folks are pretty excited about it I guess. And more Star Wars coming to DHS, and a 3rd theater & new movie for Soarin' are music to my ears!!!