Will Disney World still go ahead with installing Donald Trump into the Hall of Presidents?

They can do whatever they want whenever they want. Relatively early in the 2008 election season, Disney announced that the new version wouldn't have a speaking role for the sitting president because they wanted the focus to remain on the office rather than the individual. Then Obama won and they basically said "Phew! We're so glad that happened, instead of getting that old fuddy duddy!" and they rewrote the entire show to focus on various elections that paved the way for Obama's win, making the entire show more-or-less about the sitting president

I see no reason why they can't backstrack again (a lot easier this time, since they haven't expressed any intentions with this refurbishment) and change the format of the show. Yes, some people are going to be outraged by it, but they're going to piss people off regardless. With so many unpredictable things about this presidency, they might as well put out a show they like

 

If they REALLY wanted to get trolly about it, they could just leave it as is for four more years ... with Obama as President.

 

Well it is WDW. They are kind of known for letting things rot.

 

Well, if they have the courage, yes they could, but, whatever they do that downsizes Trumps "authority" will be subject to his rants and possibly the power of his personal army of rats following him to the cliff edge. It is going to take a lot of courage from a lot of people to get through the next two or so years. By then the problem will either be solved or we will all have succumbed to the Orange plague. But, since Disney has invested mega-bucks in China they are going to feel the need to make nice in an effort to prevent him from causing more problems.