I put a bet/guess in and said that NG will be fully rolled out by late spring-early summer of next year right off the opening of the Seven Dwarfs Mine Train. So that's what I'll say but I probably will be wrong. New attractions on the other hand might be more diffucult to answer. That's not to say stuff is coming to WDW as you can see in @
wdwmagic upcoming projects/rumors thread. So we shouldn't rule out the possibility that Carsland minus Luigi's gets announced at D23 or we hear news/more news on Avatarland/Pandora (still see it happening even if it's troubled/in delay) and see more conept art of it. But again, Disney(TDO more specifically) is pulling themselves out of the attractions business and declaring that they are in the "guest experience" business. If you need proof, watch the NFL pre opening day media event video and you'll find Tom Staggs reiterate/reinforce that statement. But I'll be an opptomist and say that new attractions will be coming left by the end of the decade with a SWL at DHS and that Epcot Project Spirit mentioned that's moving forward.