The quick fall 2015 to winter 2018 list:
epcot:
new early in the year
festival of the arts food festival.
frozen ever after with new meet and greet area next to norway opened, replaced maelstrom gone (longest wait times)
soarin movie has changed to soarin around the world.
it'll be one of the 5 year anniversaries in 2018 (starts oct 1 2017) don't expect much.
some of the old characters like muppets appear here and there in future world.
stage next to the large fountain added, some acts that used to perform on the US stage moved there.
the rotate the smaller stage acts much more frequently.
MK:
they painted the place (technically still in progress)
wishes is gone, happily ever after is in and you want to watch from hub.
new projection show in addition to hea.
stitch ride is only seasonal, don't expect it opened in feb 2018.
mass contructions should be started.
they moved around where security check is (it's better).
new muppets show happens time to time in liberty square.
be our guest has breakfast hours.
turkey legs are moved, check where they are. most menus have altered also removing some items from just about everywhere.
new joffreys stand in tomorrowland.
AK:
opened at night now (not everything, pay attention to ride schedules, especially if there is live animals or performers involved)
pandora world of avatar opened
new theater on the river over by asia/dinoland, new night show called rivers of light.
new disney owned eatery called tiffins with nice lounge next to it.
no more turkey legs
HS:
most of the place under construction.
check what is there to see if you even want to go
frozen is out, star wars is in.
new fireworks and projection shows at night in addition to fantasmic (and they overlap, hard to do them all in 1 night).
no more turkey legs
springs:
it's been renamed and not called downtown disney anymore
most of the construction done and you have double the places to eat, drink and shop now.
more discount mall like shopping places in addition to the disney centric shopping.
buses take forever to leave the place.
it's actually really nice, I love going there.
many existing places to eat just starting their redos now so expect more changes by the time you get there.
resorts / elsewhere:
many new options for interesting things like an appetizer and desert party at contemporary, an afternoon of dining around the monorail resorts with fireworks ending, etc..
wilderness lodge has a new outdoor bar/food location.
lots of construction happening, major room refurbs...
basically, it's construction land right now.
