If you click on some of the links in the first post of this thread it will take you to details about specific info.
But also, there is a sub-forum devoted to the Epcot development.
Here’s one thread, specifically about the up-coming closures:
Or there’s this about the park entrance:
But as I say, there is a whole sub-forum to explore. If you come out of this thread, look to the top and you’ll see “Evolving Epcot”. Happy reading!