Probably the most genius thing they've done is make Star Tours a fluid experience. When the ride first opened, it was one story over and over. When it reopened a couple years ago, it now featured a 4 scene structure: departure, first planet, message, final sequence. There are 4-5 possibilities for each one, making for hundreds of different possible rides. Because they did this, they're now going to be able to add new scenes and characters from the newer movies without even having to shut down. They can use a pod after hours to code and test and then run the new scenes in there when ready.
They've also set aside two areas in Tomorrowland to rotate content. Captain EO now runs 4D trailers for Disney films (I'm guessing Star Wars is coming around November) and Innoventions has rotating exhibits. Both are closed right now, so I'm guessing Launch Bay is heading to Innoventions. Space Mountain will get a temporary seasonal Star Wars overlay, similar to Ghost Galaxy which comes every Halloween.