most importantly, they will attempt to set a new world record by putting "Year of a Million Dreams Celebration" in every sentence.
I would not be surprised if the upgrades are announced. It would really serve to fill up the agenda if they announced, for example, the upgrades to El Rio del Tiempo, Jungle Cruise, Haunted Mansion...and perhaps Space Mountain if they are ready to talk about that. They ought to be able to be candid about the first three by now, though. They might be willing to talk about the new Spaceship Earth post-show, too. I would imagine they know what they are going to do there, by now. More info about the Asian restaurant for Animal Kingdom and also T-Rex are further possibilities. Lotsa stuff they could announce...none of which would be surprises. We might get further concept art though, which would be a nice treat (and info about what to expect from the Magic Kingdom refurbishments). There are also the rumored enhancements aboard the Disney buses--they could almost have one day where they just announce all of the enhancements in the works property wide, since Iger did mention that he wanted to invest in new technology, which they are certainly doing.